First of all you need a kind of plan, and you should prepare it by yourself, taking into account all your passions and possibilities.
It should be divided into smaller periods, and after every term you should do some work, that will demonstrate your current achievements.
Then you should research every part of your curriculum, and select some learning materials and references that can help you to achieve good results. Like:
blog posts and articles
favorite artists’ portfolios and works of the masters
take local classes and private lessons on specific topic
visit local museum, exhibition etc. or take virtual tour
watch movies and documentaries
Then carefully plan your time and deadlines for every theme, and begin learning!
The most important part is to study every day, at least for 1 hour.
If you feel stuck, try to skip current exercise and move further.
Hope this helps, good luck!