You can join any reputed National Coaching Institute for JEE or NEET Preparation. MHT CET PCB or PCM doesnt require any specific preparation. However, if youre targeting Only MHT CET very sweiously you might just prefer Online EdTech Platforms like Toppr or Unacademy for your Preparation which are really good besides your regular JEE/NEET Coaching.

For more information about MHTCET Preparation Plan and Tips do follow the link below

https://engineering.careers360.com/articles/mht-cet-preparation-plan-and-tips/amp