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.
Depends where you are located. Kalsubai, Harischandragad, Singhgad are few good treks if you are located in Maharashtra region.
Nagtibba, Bhadraj, Triund, Deoria Taal, Chandrashila are a few good treks in the Himachal and Uttarakhand regions.
You can read more details about them on my timeline- https://www.tripoto.com/profile/jaiveeryadav