You have another thing going for you, and that is the ability to write clearly. An ability to do paperwork may be something that you could sell someone on to hire you.
A poor previous record is hard to overcome. In the military it's said it takes one hundred atta-boys to cover up one ah sh..! It may take an extra effort on your part to show you are serious and will work hard and well. Next, own up to all your mistakes past and present, a whiner is not pitied but often despised. For me, the honest are held in high reguard.
Please note that I do not want to down trod depression for it is a terrible route, for I know several who suffer with such and hold them in highest reguard in all aspects. I have learned much from them and admire them and feel that I have an easy street to walk.
I wish you the best in whatever you decide.
