Linux

Really it boils down to having a basic understanding of what commands can do and why you'd want to use them in specific instances. There are general books and resources out there that can at least raise baseline knowledge, for example Introduction to Linux. Or one of my favorite The Linux Documentation Project. As experienced people forget what it's like to be new at something, you won't immediately find anything super readable out the gate; though occasionally you do run into easy to understand things just randomly on the web. Secondly reading the documentation of the distro you are using (as sometimes you'll find some useful stuff in there) like what they use as a basis to create their distro. That can aid one's troubleshooting because you know where you can look in order to achieve the result you crave. Or help you ask targeted questions that can boost your ability to learn about things.

Another is not using an Arch-based distro when you've only used Mint as your first distro, that is a difficulty spike that you aren't ready for. Ubuntu is probably the easiest to get your toes wet with, after Mint, as you have graphical ways of solving problems and terminal based solutions. A great hybrid for learning the basics, as most command related solutions are similar (but do have different structure based on the distro). As Ubuntu's documentation is fairly solid and can mostly be parsed once you understand the basics. Linux is a different animal in a lot of respects, it's meant for people that are ready to learn and Linux can be learned over time. To really understand, it will take time and effort to parse documents, think, and apply the fruits of those mental labors. However, as Linux is a community, you can reach out to others. There really isn't an easy way to do this, is my point. We all start out fresh, but because humans have brains, you can figure Linux out.