Lets start off with what I feel is one of the most important questions, what are you going to use it for? There are a lot of fellows who have learned one system or another and use it just for making 3d models. That's fine if you, like me, like to learn new things all the time but the question is what exactly are you going to use it for. Some use modeling to actually create a CAM program for their CNC tooling.
For anyone to say that there is an easy way to learn a comprehensive icon based modeling program they are misleading you. Most of the people that respond that way have been doing CAD work for quite some time whether for work or their own use and have forgotten how they got to where they are.
I for one started off with a program called AutoCad. This was a 2d program used for making 'mechanical drawings." This program can use command inputs, which are even harder to learn and use, or the industry standard of icons. I became pretty adept at using this program and through my work was introduced to several different types of 'modeling programs'.
Just so you know you aren't the first person to ask this question.
To learn any of these CAD programs one has to start with small steps and as is the case when I taught myself Solidworks, buy a book. I bought a book and walked through the exercises doing the projects at the end of each chapter. At this point I have to clarify that I already knew how to use two or three major CAD programs so this was more learning the intricacies of Soldiworks. I find that almost anything on Youtube takes for granted that you know how to navigate the home screen and know what the icons do. As you have leaned you get two steps into a learning video and you're already lost.
I'm not even going to get into a step one, step two explanation, that's not my intent, but rather to say if you really want to learn electronic drafting and modeling start off with a simple icon based 2d program and get the basics of how to use it. I have found over the years that all the programs out there are pretty much the same. There is only one way to draw a line. The icons might be a little different (proprietary program) but they all do the same thing. If you really want to jump into solid modeling then pick a program, no matter how simple, and work at it until you become proficient enough to create a reasonably complex model without having to go to the help page to complete it.
Then ask yourself, what am I going to do use it for?
Attached is a Solidworks model of my flathead engine. It's pretty but I only do it to keep my knowledge of the program up to date.
gbritnell