As a beginner there are lots of things to put in consideration and there are lot's of things you have to avoid. First of all you don't have to be greedy when trading, you also have to learn how to control your emotions when trading, don't always fomo, always use your stop loss but I think that one is optional, always make sure you make your own research before buying any coin, avoid coins with low volume and always know when to exit the market. I think this are something you have to know as a beginner but you can still do more research.
Knowing these is one thing, being capable of doing them are another, I would say you definitely know it right and you should follow these very carefully, but it will be a lot harder when you are in a tough situation with it. I am not saying you will fail, there are so many great traders and investors who started as newbies like you and became great, you could definitely become one of them, there are so much more people who knew but failed because they got excited about it as well so try to not be like them.
Also work on DCA a lot, there is always merit into that because if you can do DCA properly and keep buying consistently for long period of years? That is going to end up allowing you to retire without any problem at all, that is the type of thing you should be focusing on and not just how to buy low and sell high since that would be too quick.