My advice, from what I've learned, especially if putting in small amounts....
1. Start with
Coinbase (phone app and website). It's easy to use, and supports the major cryptocoins.
2. Try to buy as much as you can in ONE transaction (so you don't take as much of a hit on numerous transaction fees).
3. For the reason above, stick more to the main coins supported there. (Bitcoin, Etherium, Litecoin, Bitcoin Cash) - Diversifying into different coins can help offset losses in others. Just as with any other investment.
4. If you do want to get into other coins, use
Binance. Pretty easy to use, and they support just about anything. They are also no longer based out of China, so no regulatory worries there.
5. Unless you are looking to "day trade" (buy and sell alot), and with high dollar amounts, the transaction fees will kill you. So buy it, and sit on it, if you are a small investor. (I already made this mistake a few times, and realized it). Try to only buy when you can do at least about
$40 or more. Because you may not be able to do a transaction of these other coins, for any less (on Binance, or through any other broker site).
6. Get the
Blockfolio app, and enter all of your values there, if you do use multiple brokers. This app will let you keep track of all of the investments in ONE place, which is handy.
7. As tempting as it will be, DON'T check the values every day, and especially not multiple times during the day (you will though, at first, I know it, hehe....). Just don't worry about it. The best site for checking though, is
https://coinmarketcap.com/
(but the Blockfolio app has the values too)
8. Don't invest more than you can simply afford to lose. Think of it as buying a lotto ticket where the drawing isn't until a year from now, and your odds are anyone's guess.
9. There's no such thing as an "expert" in forecasting Crypto. They have ALL been wrong, so don't believe it. You'll see hype about all kinds of coins (like Ripple, Stellar, etc.), but personally, I've lost a lot of value in these (though still held on to them).
10. Once you are in for a few hundred (or whatever seems riskier to you), you may want to get a digital wallet (vs. storing your balances inside the exchanges (like Coinbase and Binance). That way, if anything happens to THEM, you'll still have your cryptocurrency in your physical digital wallet. (like a portable hard drive).
Most of all though, just have FUN!