Think of tutorials as training wheels -- they're nice to have in the beginning, but the sooner you can cast them aside the better. Because there are sometimes so many tutorials to choose from, make sure they meet at least these 2 criteria:
- The tutorial should be compatible with the version of software you're trying to learn. If you have Godot 3.0 you need to find the tutorials that were made using the same or very similar version.
- Only watch the tutorials that show you something you might actually use in your game. It's unlikely you'd find value in a FPS tutorial if you're trying to make a platformer. Once you do find one that's relevant, the end result doesn't have to be the same. For example, yesterday I needed a new shield graphic for my game, but I wasn't sure how to do it myself. I found a tutorial that showed how to do something similar and I was able to tweak it to my personal needs.
As for loneliness, what I've found really helps is getting involved with communities that share the same interests as you. And if you're an introvert like me and don't particularly like social gatherings, there are tons of forums online dedicated to very niche categories. Like if your goal is to make a shmup, you might want to check out a site like this. Or if you really want to get better at Godot, maybe meet others on their forum.
Best wishes on your gamedev journey!