Dedication is the easier of the two for most people, I think, since it is a mindset more than an actuality. Sure, you'll hit some bumps in the road--that's life--that interfere with short-term consistency (of course, "short-term" is relative for everyone), but in the long run, it's applying that dedication of mind to the dedication of your body.
Having a support network (even of one other) is great and sometimes necessary to help keep you on track, but as many (most?) successful people will attest, it's ultimately an inner drive. That's why those around you are support, not foundation--that's you, buddy. Read and talk and listen and learn as much as you can, then internalize, filter, and use what's best for you--everyone's situation is different.
By the way, Mahler successfully divided by zero
