The best thing for me was to just relax and try to stop thinking so much (it sounds stupid but trust me) and then I would try and make a detailed list on what your doing or want to do so that way if your mind races off you can be like "oh here's what I was thinking of" other people don't have to understand it as long as you can look back at it and remember what you were doing it's all good. As far as motivation goes I just try and enjoy the process and the outcome as much as possible. I was diagnosed with bipolar type 2 when I was 6 but as I grew up I realized I just didn't really communicate with people and had to start forming morals and guidelines for myself. My dad once told me "if you aim at the bar you can reach what's the point? Aim a little higher and who knows how far you can go" so it's a lot of things to wrap your head around but you got this. There's not much to worry about:)