There's two easy ways into the alpha I can recommend: The Silva Method or getting a Hemi-Sync tape. Jose Silva's first book should sell at below 10 US$ and a Hemi-Sync tape at about US$16. Any HumanPlus tape from the TMI has a teaching exercise for learning to go to Focus 10 (an alpha state), and the MindFood CD "Transcendence" leads you into Focus 3, 10, 12. The TMI people say that you can go to these states again if you remember how they felt, so you can use the "Transcendence" tape for getting a feel for these states and revisiting them.

Hemi-Sync is not recommended to replace medical treatment, but maybe it can help with stress.

Take good care,
Oliver