I would start by reading and understanding what bitcoin is first. You can read the white paper via the link below, where it says "the gospel according to Satoshi".
As far as the best coin? I only use bitcoin. Litecoin has some following, but almost all alt-coins are a train wreck and some are outright scams. I would avoid them until you completely understand the bitcoin protocol. At which point you will want to avoid them.
Some? You mean 90% of the altcoins are outright scams, if not more. Right?
hi. i would like to know if i can have more than 1 wallet for bitcoin, litecoin, dogecoin. and which are the best. i also would like that if the moderator could reply me. thanks
You can download a wallet for each of these coins. The Core versions of the wallets are used the most as far as Bitcoin and Litecoin goes. For dogecoin there are plenty of wallets, but if I was you I would stick to the wallets that the official coin sites offer.