Hi Robbie,
In seeking a group to help your Bible studies, I do believe that with any teaching group, nondenominational or not (even if they do not 'look' like the standard church) that you will be indoctrinated with their beliefs. I do not believe there is any organized group teaching the 'truth,' they are all worldly. Check into their background and see what denomination they come from and you will probably find the basic beliefs you will be taught from them. Now they may have good intentions, but that is far from being enough to teach God's truth, the world is filled with good intentions...
If you want help in your Scripture studies, Ray's articles are a very good place to start. His method of study comes through very well and he speaks very plainly about keys point to learn, "pay attention to all of the words... once you learn a spiritual truth, don't ever let it go," This is not a quick and easy study either, there are many articles over a broad range of topics, but so well worth the time and effect.
After all of my worldly pursuits of seeking God intently over the years (actually a necessary backdrop in deception), now I have come to realize without doubt Ray was the only one that really taught the truth. Through studying his material it laid a solid foundation in the Scripture that I can now rely on in my own studies.
Hope this is helpful to you.
mercy, peace and love
Kat