i saw some interesting learning info @coindesk, but the first thing u should understand about cryptoinvestment - is careful cheking each project u are interesting in - i reccomend u to research founders, business model and whitepaper before u go in any project. defi are very hyped and proditable for now
yeap defi r good but a lot of scams. i invest in defi even in long term strategy, and especially interested in credible dex-es