The best thing you can do is to go to a makerspace near were you live. You will learn so much just by osmosis with the people that know just being around and lo

The best thing you can do is to go to a makerspace near were you live. You will learn so much just by osmosis with the people that know just being around and looking. Then you need a project that you want to do and ask those guys how you can get there. You will need to learn some CAD, some mathematical concept and you will get something. Then you print your pieces using their printers. If at this point you enjoy it, you will want to have your own 3d printer. The guys will help you with this too. For example I am part of Clone Wars RepRap, an Spanish language group. We are more than 5000 people. We help each other a lot. I am also part of German,and Austrian groups. Without the social environment, buying a printer yourself you will probably find it too hard, specially at first.