I HIGHLY recommend you to start with ethereum instead.
That being said in general you want to:
0. Decide for yourself, WHY exactly you're going into this. Read about blockchain, about current state of crypto currencies. Read abour erc20 tokens, about projects with ICO's
1. Get a wallet (hardware or good software like myeitherwallet or Exodus (multicurrency). Get your wallet adress from here.
2. find a way to buy btc or eth or ltc or anything else with your fiat currency, deposit to your wallet adress. There are many ways, popular options are for example coinbase.com or localbitcoins.com, localethereum.com
3. register on exchanges (if you want), deposit funds from your wallet to the exchange. Withdrawal back when want to