Yeah, I just picked up 2K15 on a whim since I haven't played a basketball on a console in years, and the lack of tutorial was puzzling as hell. The videos are decent though, plus need to actually read the controls in the "manual" (even PDF manual sucks). However, there is freeplay where you can practice some offensive moves and scrimmage which does not count toward any career stuff.
Plus, you can set your user settings way high for all kinds of minute stats and set the game on rookie mode (well, you can also set CPU low), so that got me through initial bewilderment. I have to say I am enjoying MyCareer mode so far (just played a few hours), haven't seen that done well in any other sports game (mostly EA titles).
I am confused on VC points though. How difficult are they to earn? It appears 2K is quite stingy with them and you kind have to buy. How much stuff do you have to plow into your player to get decent on Pro or All-Star modes?