sorry,but a few of your way of thinking concerning those spiritual beings are wrong. i will show you with scriptures. first you said...Jesus teachings and concerns are were basically directed towards relationship to God and how it affected to our "relations with our fellow men, than a detailed set of do's and dont's." besides dying for our sins,Jesus was ALSO sent here to teach humans about HIS Father. and all we know when it comes to doing his Father's will,(Matt.12:50-For whosoever shall do the will of my Father which is in heaven, the same is my brother, and sister, and mother).
he also gave us a set of rules,("do's and dont's"), to follow...
1. many believe ministers should get paid, he shouldn't! he tells ministers,to teach their flocks for free ,(Matt.10:8 -Heal the sick, cleanse the lepers, raise the dead, cast out devils: freely ye have received, freely give). (dont do things of God for a price, Jesus didnt!). and (1Pet.5:2 -Feed the flock of God which is among you, taking the oversight thereof, not by constraint, but willingly; not for filthy lucre, (monetary gain, money) but of a ready mind).
2.Matt.6:5- And when thou prayest, thou shalt not be as the hypocrites are: for they love to pray standing in the synagogues and in the corners of the streets, that they may be seen of men. Verily I say unto you, They have their reward. (many are just putting on a show)!
3.Matt.23:9 -And call no man your father upon the earth: for one is your Father, which is in heaven.(many ministers allow themselves to be called father,spiritually,thats wrong).
you then said..." He and God have left us in the hands of the Holy Spirit. If asked the Holy Spirit will help us in our prayers." again you're wrong, because the H.S. isn't a third part of Jesus and his Father Jehovah, the H.S. isn't a being,scriptures shows this....
(1).Acts 11:24 For he was a good man, and full of the Holy Ghost and of faith: and much people was added unto the Lord.( here it taking about Barnabas, if the Holy spirit was a being, why doesnt the scripture say Barnabas was a good man, always having the holy Spirit with him, or something like that. Instead it says he was full of the Holy spirit)! and (Acts 7:55,56- But he, being full of the Holy Ghost, looked up stedfastly into heaven, and saw the glory of God, and Jesus standing on the right hand of God, And said, Behold, I see the heavens opened, and the Son of man standing on the right hand of God). again he was FULL of the H.S.. NOT with the H.S.
(2). here,there's no mention of a third high being called the H.S.,(Rev.7:10 And cried with a loud voice, saying, Salvation to our God which sitteth upon the throne, and unto the Lamb),ONLY Jesus and his Father.
(3).Rev.5:1-8, here the Angel showed no one in and out of Heaven,except for Jesus,(the lamb). could take the book out of Jehovah God's hand,(he's seated on the throne). IF...the H.S was a high being,as Jehovah God and Jesus was. why wasn't he even sitting on a throne,not to mention being worthy of taking the book out of God's hand? many seem tho believe this "being" is worthy enough to do any other speacial thing!
simple for those who's truely seeking, the H.S. ISN'T a being. it's Jehovah's active force. it's Jehovah causing things to happen. example, someone get's you upset,your first tought is to get revenge. but the second though is to let it go. it's NOT your thought..per se,but Jehovah's H.S, he put in our head the right thing to do. of course,one doesn't have to follow it. but all right thoughts we have , is Jehovah basically giving us, food for thought.
so it's NOT a H.S that "Jesus and God" left humans in the hands of. because again it's Jehovah's H.S.,which him personally cauing to happen. it's Jehovah's H.S we need when we pray...to Jehovah IN..Jesus name. peace 
I am well aware of the JW views and disagree with many of them.
The very early church as taught in the "Didache" agrees that teachers (prophets) should not ask for support, indeed they should move on in three days, or support them selves with work.
They taught that the Euchrist should be offered when ever they met together, and given in the name of the Father the Son and the Holy Spirit ( though there was no concept of the Trinity) They believed in baptism, also in the name of the Father Son and Holy Spirit. they believed is should be done preferably by immersion but gave alternatives.They taught a majority of the Jewish Do's and Don'ts, But did not pretend that these were the teachings of Jesus.
The texts and booklets that the JW's distribute and discuss, are heavily weighted to the old Testament and Jehovah. Their book "The Greatest man who ever lived " which is intended as a tract on Jesus life, is a framework for their own religious interpretation and becomes increasingly so as it progresses to "revelation"
When you say that the Holy spirit is not a third person, that is indeed a JW doctrine, However a majority of Christians would disagree, even those that do no accept the Trinity as understood.
I have read and discussed religion with many JW (missionaries) and understand their point of view very well. I do not say that you or they are wrong, as their work is to be admired. However I agree with little of it, nor with the practical outcomes of the teachings..
