Few trekking groups I know of are : AwaraRahi, Ashwamedh adventures and Gadvede Trekkers. If you think, info provided by me is helpful please hit upvote.
If you are looking for some adventure and fun you must check out Bhandardara, dist. Ahmednagar, Maharashtra. It's an amazingly beautiful place. There are mountains all around. Bhandardara is situated in the midst of Sahyadri range. You must visit this place once at least. Check out The Land Of Wanderlust (TLOW) website..... https://thelandofwanderlust.com/
For Details please share your mail id or what's app message on +918450977725.
Warm Regards