I'm glad it's starting to make sense, Samy :)
But perhaps I can ask you a question about your rigging goals.
Do you have something in mind that you want to rig?
Are you wanting to rig something for a game engine, or a character that you have made for a short film, or you just want to learn?
This RIG course is advanced and I think we need to start you off on the right path in order to achieve your goal.
First step - what is your goal?
my goal is to rig and animate robots,mechs,cars and weapons and anything related to hard surface so that I can build short movies and be able to make my own games if I can in the future
Ok start here (Fundamentals of Rigging) - and make sure you submit your work, this is probably the most important part of your learning.
Even if it's "Easy".
You can't learn to swim by watching someone in the deep end of the pool. You practise in the shallow end, make mistakes, learn and progress.
If you jump straight into the deep end - you're going to sink.
Hard surface rigging isn't really any different to organic rigging other than most of the time you don't need to do as much weight painting.
You will learn all of this in the Fundamentals of Rigging.
Go, Samy, Go.
kkadory87 - I'm here to echo what Wayne has said. Definitely check out the fundamentals and submit your work. Wayne is an absolutely amazing instructor and will look over your submissions and provide excellent feedback. Rigging is challenging but you've got this!
@Wayne Dixon I submitted the exercise for parent rigging in Luna course yesterday but didn't get your feedback yet