Nice tips you got there but I think your tips are lacking something. One of the most common mistake a newbie does is to invest in only one coin which in the end leads to loss if that certain coin does not perform well. That being said, you should have had included there this: "diversify your investments. Never invest in one coin only and always remember to not put all your eggs in one basket".
things that are good or you can get an idea just ask for more help with it, or before you enter such a profit you should have enough knowledge and of course you trust yourself