HELP ME!!

So, I just wanted a help from all of you.I have prepared only for boards but for jee 2nd attempt and bitsat, confused which teacher to follow!! Please suggest me maths and chemistry teachers on yt for bitsat and jee mains only. Is bounceback series of nishant vora is enough for jee mains?? Also if yes then this year or previous years?? For chemistry, I was watching Sakshi vora mam but some of people commented that some topics are still missing out and I need to prepare for bitsat so I need to cover all topics, so shouldn't I follow these oneshots?? Totally confused!!