Good tips.
I'd add that, in order to become a better investor, it's important to experiment and take some calculated risks. Of course, to your last point, one shouldn't invest more than they can afford to lose (meaning keep enough for living expenses), but investing even a small amount so that you have some "skin in the game" will make you pay more attention to the project, and learn from its failures or successes.
Thanks for dropping by and it is going to see how helpful this will be to the community as a whole too