Wow this explains quite a bit of what I am like, I've been questioning the same thing (not diagnosed with anything yet)
I guess I'll write down what I relate with (both for anyone here to read and for my own reference)
I also have trouble focusing on my online schoolwork and pretty much anything I am not interested in, doesn't help I've had this issue for years so even if i tried to pay attention everything would confuse the hell out of me. Ill usually find myself doing something else along side my work, and I also get distracted quite easily by anything going on around me, and while doing testing (every year besides the last few, I've had to go to a place to do state testing) I've found myself getting distracted by stuff going on in the next room.
I've also found myself pacing around the yard or around the house listening to music, although not as much with music outside, most of the time out there I'm daydreaming, sometimes I do it inside too, but it doesn't cause me many issues, its just something I do from time to time.
I've had special interests in computers and technology for as long as I can remember, as well as other random stuff that other people my age at the time probably never even knew existed.
I can usually talk to people pretty well, but I am definitely less open with people I don't know and can get a bit nervous, and do zone out sometimes when I am bored in a conversation.
I don't have to walk anywhere with other people, but when I am riding my bike around the block and there are other people around, I usually get those thoughts (about if they think I am weird for sticking to the same area, as well as when i sometimes talk to myself at the same time)
I can do eye contact okay, but I usually can only do it for a few seconds at a time before I look at something else.
I have also had issues with getting things done, usually in school, I've had to do a ton of catch up and quite a lot of my assignments have been submitted the day before or a few days before the final due date.
I have the same issues with sleep, my mind just never shuts off, although I don't have many issues with alarms, besides delaying them a bit.