Maybe look into index funds if individual stocks are proving a headache. They would give you instant diversification across multiple businesses and industries, and automatically rebalance over time.
As noted above markets are a little crazy right now - but if you invest some money on a regular basis, on each payday for example, you don’t have to worry about getting the timing correct.
I would also make sure I had a bit of cash to cover expenses for a period of time so that you are able to leave your stock market investments to do their thing, and not have to worry about selling them at an awkward time (e.g. March 2020).
https://monevator.com/ is a source of plenty of sound advice if you’re starting out.