keep the domain; start a blog. if you don't like the logo - let it go.
or get rid of the domain. up to you!
nothing bad happens if you keep them; or get rid of them. I assume you paid a year or two worth of the domain.
The best thing you could do is maybe make use of the resource now that you have it. The worst is maybe to not make use of it. (actively doing yourself harm aside...)
keep the domain; start a blog.
The don't think having a domain name is a reason to start or not start a blog. It shouldn't factor into the decision as domain names are cheap.
This thread is for asking any questions that might seem obvious, tangential, silly or what-have-you. Don't be shy, everyone has holes in their knowledge, though the fewer and the smaller we can make them, the better.
Please be respectful of other people's admitting ignorance and don't mock them for it, as they're doing a noble thing.