Any cool photo editing guides?

Well, most of the Youtube guides aim at show you the features of the particular programs, so I think it's better to start with choosing the program first. I think it's better to just google it out, like "photo editing software for beginners" or something like that. Or here is a list of programs, too- photoshop-alternative.com/
And then you start to look for a particular tutorials for a certain program, like here is a video guide about editing photos in the app called Picsart- youtu.be/Nt3zG5ccSak which is beloved by my DGD So, find a program first, then look for a tutorial. Good luck!

I use Gimp, which like a free version of Photoshop. There is online help, including YouTube videos. It takes a bit of practice but I find that I don't need to know everything, just enough to allow me to do what I want to do.

I've used it for restoring old black and white family photos (including replacing half of someone's head!) and it has made them much clearer. I've also restored lots of old colour pictures that had gone yellow.