dont join any gangs the mc would lose his ability to choose his fate if. make this a quest if they truly go after him then have him take them down in some underdog way simple as that
no there no point in him being in anbu plus it will kinda kill his character that been built up another point is there is plenty of movie/filler missions that he could do to fill in the time
Ch 68 Question Time [2]
What If Naruto Had The Six Eyes & Limitless Curse Technique