I don't want to read a lot of staff about bitcoin, I just want somebody to respond my questions. Thanks anyway.
You can have as many wallets on blockchain.info as you desire (please use 2 factor authentication when you create each one). Maybe think about using the Bitcoin Core wallet too for better security, you can have many bitcoin addresses within one wallet -
https://bitcoin.orgI personally wouldn't bother with any other coins, they're a load of scammy rubbish. Only Litecoin 'maybe' holds some degree of respect in the real world.
RodeoX is right though, you should educate yourself on what you're dealing with.