Unfortunately, with a 6 percentile in MHT CET, you are highly unlikely to get admission to any engineering college through the CAP round. The cutoff percentiles for engineering colleges in Maharashtra are generally much higher, often in the 50s or even 80s for popular branches in top colleges.
You can consider other entrance exams or universities that have lower cutoffs. If you're interested in engineering, start preparing for the next MHT CET or other relevant exams. There are many other rewarding career paths available. Explore options based on your interests and abilities.

It's important to remember that your MHT CET score is just one factor, and there are many other opportunities out there. Don't get discouraged, and keep exploring your options.

I hope this information helps.