Hey,
As per the predictions, the cutoff for OBC category will be in between 70-75 percentile.
https://www.google.com/amp/s/engineering.careers360.com/articles/jee-main-cutoff/amp
So, there are chances that you will qualify the exam. And about JoSSA, everyone is allowed to participate in JoSSA counselling irrespective of the fact whether they have qualified jee main or not. So you can participate, but seats are given to those who qualify the exam with a decent rank. Just qualifying is not enough to get a seat in participating institutes of JoSSA counselling.

However with this score you can get colleges like:
GNOIT GROUP OF INSTITUTIONS, GREATER NOIDA
TIT, BHOPAL
DITM, SONEPAT
LNCT BHOPAL
Guru Tegh Bahadur Institute of Technology (GTBIT), Delhi
Fore more predictions of the colleges that you might get with this score, you can use the college predictor tool.
https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer