As i stated, I'm atheist, and I'm not trying to debate/change this personal view. However, I am particularly interested in dharmic religions. Considering I'm atheist, I believe this leaves me with the option of Hinduism. I am particularly interested because I would like to achieve a low stress lifestyle/outlook to reduce depression and anxiety. Any info regarding where to start would be helpful: text, books, groups i fall into, practices, ect..... I am fully willing to dive in and see where it leads me.
Iyengar yoga.
The practice of asana (the postures) is profoundly effective in reducing anxiety and depression. At the same time, you will get a very gradual introduction to the Yoga Sutras of Patanjali, which is a form of hinduism which is much more akin to buddhism (which I feel certain was a major influence on his philosophy), written around 250 BC.
No issue is made of whether you are theist or atheist.
The system teaches meditation in the context of asana practice, with instruction on pranayama (breath control) as you progress.
By taking the body, and your responses to the asanas, as the object of meditation, you avoid the pitfall of getting into complex ideological constructs in relation to meditation. The practice uses the principles of neuroplasticity, by putting you into a situation outside your habitual comfort zone, and then encouraging a deep relaxation within that state. This is very direct, when compared to philosophising about suffering and how to end it.
So it is very practical, simultaneously addressing your physical, emotional, mental and spiritual aspects. ... and it's also a way of developing a very fit, strong and flexible body.
Classes begin at beginner level, and as you progress you can opt for more demanding levels of practice, which include inversions (headstands, forearm balances etc) and backbends.
Speaking as someone who was previously prone to severe anxiety and depression, I can assure you that the practice is incredibly effective for dealing with that. I have also studied and practiced other forms of meditation in the past (Vipassana and Tibetan buddhism), so I can compare those different paths, and for me, Iyengar yoga is definitely the way to go. And as an added bonus, I no longer suffer from the compressed discs in my lumbar spine - I have gone from chronic discomfort to pain-free comfort.
Do a ten day beginner course, and it will be very clear to you if this is a suitable practice for you.