Learn the basics first. There are many videos on youtube that will help you. Making a game could be advanced. You could also try "Scratch" to learn the basics and make a "game" at the same time.
Watch youtube tutorials or try a course like freecodecamp. When you know the basics, start with a small game and eventually you'll get to bigger projects.
I was always told RTP/RTM (Read The Page/Read The Manual) and that helps a ton. Also, check out videos on YouTube (may take some digging to find a good one) and check out Udemy for paid courses. On Udemy, make sure you wait to buy until they are on sale.
adding on, learning to read the documentation is a skill in and of itself. It's not written for the health of the author, but of those who are using it.
I'm always a big fan of Udemy courses. They're usually like $15 and if you get a highly rated one there's a lot of learning potential. They can also be j packed with content.