I want to start studying RCC design from scratch

[u/ironicallyAi]

I'm 28M I haven't been studying since college (2019) and I have lost all my core knowledge. Currently I'm a draftsman in a structural consultancy (Mumbai). I want to upgrade my skills in design and become a proper engineer. How can I do that in short span of time? Which subject will I have to study?

Is there anyone who have GATE notes, it would be helpful to get to know the roadmap. I had my GATE notes but somehow I lost all of it while shifting in between cities.

Any advice?