Hi Anita, You can travel to Matheran, Karjat, Lonavala, Nashik, and several other places near Mumbai that are easy to reach. You can explore more places in the trips attached below. Keep exploring!
Just a few hours away from Pune is Satara's Plateau of Flowers which is a very beautiful and affordable get away! You could refer to my blog for further details. A 2 day trip would cost around 1500 rupees!