It depends from where you are. search for the local treks nearby. Don't directly jump towards famous himalayan treks. If you are from Maharashtra then you can try Sinhgad Fort ,Lohgad Fort , Koraigad Trek. ,Rajmachi Trek
As a beginner try going somewhere nearby where you stay. Look for groups organizing treks and join them rather than going alone initially. Once you get sufficient experience, you can look for going on longer treks.