There's a lot of things you need to consider that if you don't give importance your investment may be at risk so here are some of the things ou need to consider or to study.
Learn about the basics first such as:
Bitcoin wallets
How Bitcoin works
What is Blockchain
Types of wallet
And different kinds of investments
Second Learn what kind of investments you need to do, here are:
Trading
Holding
When you've decided what kind of investment you're going to do start finding exchange where you will bought your first bitcoin there's a lot of platforms where you can buy bitcoins such as:
LocalBitcoins
Binance
Coinbase
Just search on the internet.
NOTE: You should know the risk you're going to face when it comes to investment remember that there's no assurance that if you invest you're going to earn so invest only what you can afford to lose.
The benefits of Bitcoin in life are quite a lot, but as 'unreal' and do not have legally written laws, Bitcoin has some weak points, and it would be very damaging to invest in this currency but we do not know it.
Basically, any form of investment must have risks, whether investing land, foreign currency, until gold. But the difference is that some of the examples I mentioned are real objects and have official government regulations.
If you are interested in Bitcoin or other digital currencies, then it's good if you know in advance some of the risks. Bitcoin investment is not an easy matter. Given the price of 1 BTC which is very high now, of course you will spend a lot of money to start this investment. What if something goes wrong?