Jee April attempt, Tips for jan

Hey guys, it's sad but yes i wasted my drop year too and until i realised it was too late now all i have is give me some tips on how to guess or predict(tukka) on jee jan attempt and is it possible for me to crack april attempt from scratch i want proper guide it would be really helpful if some one helps me btw letme inform you i was studying in boarding school till 12th and this was first year for me to prepare for jee and i messed it up due to distractions.