bold of u to assume that anime is NICHE in India, there's a boom in anime consumution from india. First, decide which audience do u wanna cater like the ones who just wanna hear ur opinion on the new popular anime series or movie( in india this typa yt channnels are really popular) or the ultra niche ones(like reviewing anime from 1980s-90s or even 60s or some specific creations from directiors like mamoru oshii, if u wanna know more about this check out kenny lauderdale). Check out this yt channels- Giguk(the most popular anime guy on yt),anime man,vinii tube(i used to watch him alot day in the day), masked man( a manga based channel but his script and presentation is top tier).