ADHD is a neurodivergent condition in which the brain is likely chronically low in dopamine. As novelty-seeking and impulsive behavior helps spike the production of dopamine, we seek anything fun, new, different, bright and shiny.
Starting a project is usually no problem for the interested ADHDer, but as soon as the novelty wears off, so does interest in the project. Add to that a problem of working memory making us incredibly forgetful, and nothing ever gets finished.
Inability to focus is most likely hindering your motivation levels. Be aware, too, of the paralysis that sometimes happens in the house before a significant event like an interview or appointment; a lot of us will cease to be productive in any way until that event is over.
It's worth getting checked again. I find ADHD is made much worse by stress. There are meds that help and tools you can pick up. In the meantime, check out www.therapistaid.com and search ADHD for information, training, worksheets, etc. Much of it's geared toward kids, but there's some useful stuff there.
[And if it's any consolation, this post took me about 25 minutes due to distractions and rabbit holes.]