Trade in coins that you believe in, so that if the market does tank. You hodl it and wait for it to come back instead of panic sell.
To learn, look for coins that have the potential to go up and buy a coin at a low price then sell at a high price or after earning a profit, start with a small amount first my advice for beginners is to find a good market and observe the movement
It's important to start with a small amount because most likely as we are just newbies we tend to make mistakes.
Be positive all the time and make that mistake as your learning experience as in that way you will grow as a trader, never quit easily, it's a long journey.