So just as a general overview, 3D is big. It's a gigantic field of art, very different from drawing, you will not only sculpt with digital brushes, you will create digital skeletons, you will unwrap the skin of your models to apply textures, you will create textures, materials, renderings, compositions etc. It's not an overnight project no.
But to get you started you should definitely check out the Blender beginner series on Blenderguru.com https://www.blenderguru.com/tutorials/blender-beginner-tutorial-series
Also check out http://creativeshrimp.com/ for more resources.
You can also get help and tips on the http://blender.reddit.com subreddit or join the discord.
It takes some time to get started yes, 3D has a very steep learning curve, especially for beginners.
Best of luck. You got my telegram and Discord, so just hit me up if you need help