It will be better if you give jee mains consecutively as it is for fresher to crack jee mains.During drop year ,You have to study each chp of both year class 11th and 12th This is really difficult to go through each chalcha in single year.But for fresher little effort require to crack jee mains and advance.

But Right now,you should give both phase of jee mains exam to gain experience and also to know about pattern of jee mains.

You can ask if you have any other queries.

GOOD LUCK!