It depends on how much time a person is willing to put into it. You know the saying, "Ten thousand hours..."
Okay, I don't think you actually have to put in three years worth or 8-hour days but, still, you're going to need to pay your dues.
I've been making Blender projects in my spare time for a little over ten years. I feel like I'm just getting to the point where I want to be. But, when I started, I had little experience with 3-D. I had to figure out most of it, myself. Add to that, Blender is a harder program to learn than others. It was designed for completing its task efficiently rather than being easy to use. It wasn't quite an explicit choice by the creators but more of a theme. They wanted to make a program that worked to get the job done rather than holding the user's hand. That makes Blender harder to use but, once learned, it gets easier. What the heck? Blender is totally free. You've gotta' give Blender credit for that!
When you first start using Blender from scratch, you're bound to experience frustration. The first few times I used it, I messed around for fifteen minutes or so then got frustrated and quit. A few days later, I'd try again. I'm sure you'll experience that feeling, too, but stick with it. After a while, you'll feel more productive. You've gotta' put your ten thousand hours! Remember?
Give yourself a few weeks to a few months to get the hang. After you start learning more, the process will speed up. You'll hit your "bump in the learning curve" for sure. Once you're past that, it'll get better.
Factors to consider... How much do you already know about computer graphics? The more you know, the better off you'll be. If you know other programs, you'll be able to draw on that knowledge, too. Do you know Photoshop or GIMP? What about Illustrator or Inkscape? Not only will that knowledge help you, GIMP and Inkscape will become companions in your process of making graphics projects with Blender. (Many people post-process their Blender images with GIMP, for example.)
How driven are you to learn? The more you WANT to learn, the better you WILL learn. Do you have some projects in mind for using Blender? Having goals is important.
Bottom line: Give yourself a few weeks to get used to using Blender. It'll take a few months to become productive and a year or so, assuming you put in those ten thousand hours, to be able to make things the way you really want them to be. YMMV, based on how willing you are to work at it.
If you want to work with human models, try this one:
https://www.blendswap.com/blend/29900This is a model that I made. It's free to use for any personal project. My only requirement is that, if you want to use it or anything derived from it for commercial purposes, you need to contact me for permission, first. Beyond that, I don't much care. Just don't try to make money off other peoples' backs.
Anyhow... Download the mode. Play with it. Use it and try to make something from it. If you do, how about posting your results so that everybody can benefit?