1) If you're not into it, get out of it immediately or as soon as you can. The longer you play along, the harder it is to back out of it. The more time passes, the more the truth will hurt.
2) Holy shit, I managed to kind of fake it for 6 years without any considerable talent (by my own admission). If you put in the effort, you can do it. Anything is possible with hard work and sacrifice.
