Linux

Depends on what you feel lost about, if it is the basics in general then I would suggest you start of and read about the basics here https://labex.io/linuxjourney they write about the very basics in a very simple way. I think they did a good job, they start of with what Linux is, what distros are to commands from the most basics as how to navigate in the terminal to more advanced combinations. They also have vms where you can try out the commands if you haven't switched yet.

If it is a cheat sheet as in commands then i would say it is better to make your own of the commands you care about but you can start of by using other ppls list like this one https://www.geeksforgeeks.org/linux-unix/linux-commands-cheat-sheet/ but it can be overwhelming for you so use the linuxjouney first. Also it is very important to learn how to look up how to use the arguments in the terminal with man or -h to make it faster and less painful to use.

If you are lost about programs then there are a lot of good GitHub pages that links to useful programs and cli tools, you just need to search for awesome Linux list

Examples:

https://github.com/luong-komorebi/Awesome-Linux-Software You can use their web pages version too https://luong-komorebi.github.io/Awesome-Linux-Software/ https://githublists.com/lists/awesome-lists/awesome-bash

Here is one for distros https://github.com/kolioaris/awesome-linux-distros

Here is an example for customizing https://github.com/fosslife/awesome-ricing

When looking for programs is it very important that you know what distro you are on, what desktop environment (like kde, gnome, xfce) and what window composition you use (usually Wayland or x11, x11 is older and is more compatible).

So in short start of at https://labex.io/linuxjourney

Then look up distros here https://github.com/kolioaris/awesome-linux-distros

For new ppl do I think Ubuntu based is best because almost everything has a Ubuntu version, when you feel ready can you test out other distros. I haven't tried bazzite, I started of many years ago on debian (a few random ones like arch and mint) and then pop os for many years and now cachyos, I liked my journey but that doesn't mean it is correct for others.

I would suggest to have all of your data you care about on a separate disk or have automatic backup of it so you can break your os without care. And if you start customizing would I suggest setting up a GitHub repo and commit your changes everytime you like what you see so it is easy to go back if you regret something.

I hoped this helped on your journey, I didn't want to overwhelm you so I hope I kept it simple enough :D