Hi and welcome.
Three things that I have learned are:
Buy bitcoin at market price from a major exchange in your country.There is no special deal or way to double your money. Don't use paypal, or skype with a guy who has a good deal. Almost 100% of these offers are scams. Just fund an exchange account then buy anonymously through an exchange like a pro. Be sure to record how much you spent as you may face taxes at some point.
Sorry.
Always keep your private key under your exclusive control. After you buy some
BTC move it to a wallet (private key) under your control. Don't leave it online. If you like the convenience of online wallets then keep a minimal balance and store greater amounts off-line. In any case ALWAYS back up your wallet and store several copies off-line on various media. If you lose your wallet then no one on Earth can help you recover your money, no one.
Get the highest value on your coins by spending them. It always baffles me how many people give up money to turn bitcoin back into local currencies. Why do that when you could spend it? You will save the fees/risks of selling your coins and many retailers offer a discount for using bitcoin. Once you have
BTC you have money that works anywhere in the world. You can directly trade with millions of users using better money. That's why we buy it in the first place!