Hello

It depends upon the colleges you are asking about.

For NITs, IIITs, GFTIs you need to participate in josaa counselling

For example,
There's NIT Nagpur in Maharashtra, for this you need to participate in josaa counselling but for state Colleges like  Pune Institute of Computer Technology, Dhankavdi, Pune etc. Yes, you need to participate in MHTCET counselling , jee main is accepted for  all india seats in mhtcet counselling.

MHTCET counselling, will start after mhtcet results in October. For updates follow :-
https://engineering.careers360.com/articles/mht-cet-counselling

To have an idea of cut off , go through 2020, mhtcet counselling all india cut off  on the basis of jee main available at Official website :-
https://fe2020.mahacet.org/ViewPublicDocument.aspx?MenuId=3476

To have a personalised report on your chances of getting a college you can go through our college predictor, it will give you complete list of colleges which you can get on the basis of the category you belong to,  your home state, your gender ,   different counsellings on jee main basis like Maharashtra state counselling   etc, the link for  jee main college predictor is provided below

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer
Thankyou