That's great, Scarlet! I took sociology to fulfill a general ed requirement a few semesters ago and enjoyed it. Personally, I like online classes and have done well in them. However, from the dire warnings handed down by most of my professors for my online classes at the beginning of the semester, "online classes aren't for everyone and take a lot of self discipline." I don't know about the lot of discipline part because I have very little. But I think if you find the topic interesting, you don't necessarily need to have any more discipline than for an on campus course. You'll actually find the course interesting and won't be avoidant about engaging with it. Self discipline doesn't have to be a driving factor in that case.

Anyway, I hope you are accepted and are able to get a spot in the sociology class.