Hi, when I started with Autodesk inventor one thing that help me so much is the learning path. All basic things you can learn there.
You can find when you open the inventor. There you will learn how to make a model, how make assemblies, how make presentations and 2D drawings.
I am a brasilian, so I don't know about youtubers that teaches in English. But you want to have a adventure in other language, search about "Professor Daniel Severino" and put subtitles in English. He is a nice brasilian youtuber, I learned so much with him.
If, and only if you are coming from AutoCAD, be aware you will face 3 things: Complete different Software interface; New philosophy of work, Your own/personal disappointments. So please forget everything you think you know, this is completely new, do not be disappointed.
Ask your self why do you need Inventor, Industry, maybe is not the right soft to learn;maybe is 3D Max, Maya, Catia, Autdesk Revit, etc.
Ok, is Inventor, buy the book in Amazon, learn and do the tutorials, follow the instructions on the book, and learn the theory in order to get the very best practical knowledge.
Everything is a learning curve, go from the simple to the most complex things. Do not compare your self with others. Time, practice, and experience with soft will tell the truth.
Now, this is the thing: Autodesk Inventor, is a Manufacturing Software, its goal is to Build Virtual Prototypes and all it's tools are focus on that. Drawings are an extension of what it is in the Model, and the model is the Reality, I mean 99.999999%. Been an expert on a software doesnt mean that you can build something, make things work inside Inventor is the key, everything must work, before go to produce the zero Prototype.