HN user
I was diagnosed with ADHD when I was probably in 2nd grade and took Adderall, Ritalin and Concerta. I stopped taking them about 3 months prior to finishing my Bachelors of Computer Science. I have now been 8 months with out it and have been working at my new job quite well. Prior to that for the last 2 years of my education I would only take my medication when I needed to study hard or had a test.
Develop your own website which will be your portfolio to show everyone. Generally not having a degree will hurt you a lot and will generally lower the amount you can require for developing a website. There are websites such as 99designs.com which you can offer your designs to people that post how much money they are offering. This can help get your designs and name out there. The best bet IMO is to go to Uni next year and during your first few years build that portfolio, if you are going to a mid to large school you can sometimes get grants from certain schools if you offer to develop a website for them (I know someone who got half of his masters degree paid doing this). However in todays world the degree really does help.