yes you can start to trade forex also from India. I suggest you to use Marketiva, which has also an India chat channel in its platform where you can meet other indian traders, ask for details and maybe have a good answer from them for your 3 questions. Marketiva gives you 5$ real to start trading so you don’t have to deposit and if you made profit from it you can cash out, this is why it’s very good for beginners. Their platform is very easy to use and they have support during trading hours.