>>333436915
Practice, practice, practice.
Find a model idea you want to do and you think is within your abilities (maybe slightly beyond them actually) and try making it. If you need help ask around and there are plenty of people willing to give you a hand as long as you're willing to learn. Unfortunately a lot of this is just going to be trial and error, seeing what works and what doesn't, and learning what tools you can use to do specific things.
You could start on an MMD import - The workflow is well established, covers all basic tools you need, and most people have made one and will be able to help.