Also another question iss if I already downloaded the whole blockchain in a specific wallet lets say dogecoin so if I downloaded another type of wallet coin again will I download a different one or is it all in the downloads before
Light or full wallet really has nothing to do with your mining. You can mine to either just as easily. Lightweight is nice due to you do not need to download the entire blockchain like core. Full like core is a good wallet, but you are downloading a lot to get started.
Wallets tend to focus on one currency for example BTC. You will find a ton of great options. But there are not really good wallets to keep multiple coins in. One could do it in a exchange..... but I hate storing in a exchange long term.
I suggest reading a little on wallets and it will be much clearer and easier to understand.