Hello!
I don't consider myself experienced but at least I've tinkering with Unity for a bit.
What are you looking for? A 2D character movement controller? Side scroller? Top down?
A FPS controller perhaps?
There are some assets and scripts out there that can help you to avoid making everything from scratch.
For example:
https://assetstore.unity.com/packages/templates/systems/full-body-fps-controller...
You can even make use of scripts offered in the tutorials and then reuse them.
Or here is an archive of scripts and guides
http://wiki.unity3d.com/index.php/Main_Page
About tutorials and expectations... well, yeah, the moment you start trying something more complicated/serious than those tutorials you will find yourself very frustrated. Things like proper AI management, or proper savegame serialization/deserialization, bottleneck avoidance, or just even trying things that are not easy by themselves, like trying to make an RTS, or even a TBS, for example.
Try to find advanced tutorials, they may help you to find other ways to work with Unity or how to resolve problems.
quill18creates.
https://www.youtube.com/channel/UCPXOQq7PWh5OdCwEO60Y8jQ
Sebastian Lague
https://www.youtube.com/channel/UCmtyQOKKmrMVaKuRXz02jbQ
I'm not sure if this was you were looking for, but if you need to ask something else, do not hesitate.
Good luck!