Realize that it is a volatile market and that there is a chance you will make good money in the next 1-2 years.
Do not come in with the expectation that you will be a millionaire in 2 weeks or a month. If your investments are in the red and you are stressing out step back from watching the market for a few days or weeks.
Also as you heard only invest money im crypto where you can sleep, if you were to loose it. However with the crypto market just beginning there is actually a better chance at the coins you invest in returning profit down the road.
If you expected to get in and double your money in a month you are already setting yourself up for failure and anger. There is no magic pill to turn your money into a million over night and if there was it would be winning the lotto! Investing takes patience. If you look at charts of just about any crypto you will see they all were down for the most part for a while and then eventually recovered over time with huge ups and downs, everything in life including crypto is cyclical.