HN user
I bought the more expensive version and I find it worth it. I do a fair amount of web design/dev consulting (as a side gig) and frequently use the component gallery to get my layouts designed before I write a line of code.
Get Refactoring UI (https://refactoringui.com/book/)! I LOVE this book. It teaches you a bunch of rules, and has a component library with examples of things that look good.
If you're doing React, you should look at a tech shop. It's a smaller one, but we've done work with http://g2i.co/
It may not be best practice, but I recommend newbies to use Bootstrap. Setup is a breeze, and the way layout works is intuitive for me
Pretty fun.
5 minutes is a bit long - I think I would have the hang of it and wouldn't have gotten tired of it in a 3 minute session. Also, plurals generally (but not always) don't work.
Good job!