Here’s a new lesson on the tempomusicards.com website for anybody starting to learn basic open chords. This is a method I use with my students to help them memorize chords and it’s incredibly effective. 10 minutes a day is really all the time you need to spend on it.
Included in the lesson is a PDF sheet with step by step instructions you can print out for a quick reference. Give it a go and I think you’ll be surprised how much of a difference it can make to your chord vocabulary.