Do in-depth and thorough research on the project you want to participate in, understand everything well and don't be lazy to read until the end because reading sometimes makes us lazy so that mistakes that occur without realizing it are on ourselves.
I recommend reading the whitepaper of your chosen project, the whitepaper provides a more in-depth description of the purpose, benefits and technology of cryptocurrencies. After reading the white paper of a project or two, you should not only find your next investment, but also have a better understanding of the underlying technology they use.