Best course on bootstrap to learn bootstrap?

I'm struggling with frontend. Although my basics of html,css are clear, I'm having trouble in building websites and I'm just putting baby steps towards it(made my first simple html css site today). Thus a guidance from a mentor would be really helpful to me in learning. If I don't find any resources, my plan is to just google and read till I understand.

I want to ask this question because I wasted lots of time in the past in bad resources. I bought "CSS Cookbook", turns out it was heavily outdated. I bought Jonas's CSS course in udemy, turns out it wasn't right fit for me because it was unnecessarily project heavy. But imo you make projects on your own rather than by watching and copying others make projects.

So, recommend me a course that teaches bootstrap basics and maybe guide me towards building a website using html,css and bootstrap. I'm asking this question so that I don't waste more time on bad resources.

Should I focus on bootstrap 5 courses or courses teaching any bootstrap are alright?