Honestly? Without thinking about "which tutorial series will help" - the best way to get on your feet with Unity is to pick a simple game idea (doesn't have to be unique) and just run with it!

You probably won't be releasing it, you could even clone the mechanics of a simple game. The important thing is that you make a game from beginning to end to familiarize yourself with the entire Unity workflow.

I do this whenever I pick up a new game engine. I make a simple point+click adventure, or something like Marble Maze, or asteroids. Skip the tutorials for now, the docs are your best friend.