Awesome! You can definitely do it. I am only 15 and been working with electronics for about 1.5 years. I would defintely start with the basics. Having a deep understanding beforehand is probably the #1 skill. (good book to start with...) There are soo many tutorials and guides out there its crazy! Me personally, I read the book, then I got an Arduino starter kit. Doing things hands on with a breadboard really helps visualize things. Once you get good at that, I would try making a custom Arduino since they have so much documentation.
There are tons of people willing to help. Best of luck hope this helps!