It is a very good you already have .6 BTC. If this is what you have, and you are new here, it will be you bought that amount of BTC, which means buying is not counted as an option. There are several ways to increase your BTC, but
Note, its risky.
1. Trading, buying and selling of altcoins and bitcoins,
2. Investing into ICOs ( its advisable to make self research before investing),
3. Gambling, which contains a good amount of both losses and profits, etc.
I will be very happy with your advice in PM.
Asking for pm is not a good idea for me, cause it will lead you being scammed, using convincing words to buy your mind. Try make everything transparent, not for only you, but for every body that will need answers too.