Udemy courses are targeted at ABSOLUTE beginners. It's excruciating to pull through and finish the course "just because". And some of these courses are jam-packed with 30-60 hours just for them to appear legit, but the reality is the value you get could be packed to 3-5 hours.

You're better off just searching for or watching for the things that you need on Google or YouTube.

You'll learn more when building the actual stuff. Yes, it's good to go for the documentation. Just scratch the "Getting Started" section and then start building what you want to build already. Don't read the entire documentation from cover to cover for the sake of reading it. You won't retain everything anyway. Use it as a reference. You'll gain wisdom through tons of real-world experience. You will pick things up along the way.

Don't watch those tutorials with non-native English speakers or those with a bad accent as well. Native speakers explain things really well and deliver the message with clarity because they do what they do best: It's their language.

Trust me, I got caught up in this inefficient style a handful of times. Don't waste your time.