Help!

I have this job.. I get paid a standard rate per hour for 30 hours a week. The problem is that this is my first real serious job. I have no idea what the eff I'm doing. I just graduated from university after postponing finishing my studies because I got a serious bout of depression and then was finally diagnosed with ADHD. Everything all of a sudden made sense to me.. and it was like AHA! Finally I have an answer that explains my entire life and reasons why I seem to be so different from other people.

Honestly, I don't know how I've done so well in school or have been able to accomplish anything.

Since graduating from university, I don't really know what to do with myself. Yeah, I have this job.. and it's for 30 hours a week.. but I don't exactly know how to bill my time. My boss never clarified it with me. Honestly, this whole operation that I work for is pretty unorganized. I'm thankful for the opportunity that I've been given.. but at the same time.. having to create my own schedule in order to figure out when and how to do my work when no one is really telling me anything is really difficult.

I mean.. you think it would be a breeze.. but I almost long for a 9-5 pm job everyday just so that when I got home, I'd be at home and worry about home stuff... instead of now where I am home and I work from home.. so I never really get to escape it.

I always feel guilty because I never get the amount of work done that i want to do.

I feel nearly incapable of really accomplishing anything .. and that really scares me because one day i'd like to get my PhD.. and I don't know how that is going to happen right now because i feel like I'm still such a mess.

Anyways, can anyone relate to this experience of working at home? How do you keep yourselves on task?