When I got back into RC, after decades away, I scratch built a balsa model. Then I decided I did not want to crash this airplane. I was going at this with my very old and rusty experience and no instructor. I decided that balsa was not the answer. I searched and found the SPAD airplane. SPAD airplanes are durable, take a beating and keep on flying. That is the route I took.

If coroplast plastic, may have another name in India, aluminum and/or plastic water downspout are available in you area, check this website. Plenty of models of different sizes to choose from. Check the SPAD on rails for aluminum builds.
This may be a way for self-learning to fly. Easy to build and not very expensive.
Hope this helps.

SPAD AIRPLANES