Hello there, hope you’re well 
I also had some challenges trying to understand the documentation, my tips to get more knowledge about are:
- Start a project all by yourself;
- Try to find your questions here in this forum and, if you can’t find, don’t be shy to ask, here is great community;
- You can find some really cool stuff in the Unreal Engine Learning section over here;
- ChatGPT is a great ally when you need more explanation about some older functions;
- Feel free to message me if you have any cpp questions, it will be a pleasure.