Well, that's important and responsible choice. Investing and holding is a good strategy for new traders because:
— in opposite to day trading it simple and doesn't require a lot of time;
— you won't need lots of money to get started.
However, before investing, you will need to obtain a cryptocurrency wallet (better a hardware one) and to get coins. If you own a debit/credit card, you can apply for purchasing them from the cryptocurrency exchange. Since you’re beginner, it’s better to choose user-friendly platform, for example
cex.