Be honest !

Hey everyone, I’m preparing for JEE (dropper). Whoever got good results/satisfied with their results, please drop some honest guidance that will help juniors a lot by answering below mentioned questions!

1)Which test series is best according to you?(I heard mathongo is good, what are your reviews on it?)

2)Which online coaching worked best for you ?(I am thinking of preparing from competishun)

3)Any underrated YouTube channels that provide good quality content?

4)Tilll what month the syllabus should be overso that it does not ruin the prep?

5)Lastly, any mistakes to avoid or advice you wish you had earlier?

Thanks in advance. Your inputs can really help students like me set things up the right way.