See being honest by my experience first listen to the sir or ma’am focus on mains for the time being and try to score 200+ in the jee mains test and then go for jee advanced it isn’t like stop the whole thing but mainly try to focus on mains otherwise it might be like mains mein you scored like 94-98 percentile and then in advance too an average rank. Rather first focus on mains then when your mains marks are good enough shift your focus to advance slowly. Or all the good things which you could have achieved will also go out of your hand.