As someone with ADD (essentially ADHD with only the "attention deficit" bit, no hyperactivity) I recognise the feeling. I'm lucky to be in a position where I can work 4 days a week, but I'd still barely have energy left for fun activities.

I've now been on methylphenidate (also known as ritalin) for about a month and good god that has made a difference for me. When I get home I can get right into hobby projects or chores instead of just deflating on the couch until bedtime.

I guess what I'm trying to say is, have you tried looking into medication? I know a lot of people are vehemently against medicating ADHD issues, I was pretty much one of them. The thing is you can totally try it out and if it doesn't work for you or has side-effects you'd rather not deal with you can stop easily enough.

I've heard plenty of ritalin horror stories, but a lot of those start making sense once you read the list of side effects. You need to be somewhat lucky to not be too affected by them. If you are there's other medication that can be tried.

I guess my point in a nutshell is don't suffer if you don't have to. I've spent 25 years suffering with my inability to choose what to focus on, and a simple pill has let me trade that for cold hands and a restless leg. I'd take that deal any day. Speak to your GP and ask what your options are. Worst case you're no worse off than you are now.