How and where in india can i study wildlife or forestry after doing 10+2 with commerce and economics honours at 10+2+3 level.I basically want to do field work in forests or wildlife sanctuaries,etc. in future.

You can opt for B.Sc. Agriciuture/ Horticulture / Agro economics or Ecology This will help you Else you can do B.Sc. Zoology and can appear for Indian Forest Service exam conducted by UPSC and can make your career into it