I prefer a mane-ly (hehe) look for my hair, so I'm not really looking to modify it that way. About the hair salon, that is a nice suggestion and also another thing I've considered, but for now I'll go with what I have to see what effect it has on my hair (I don't even have the proper products for LOC yet, and perhaps even WCC washing.)
Here are the current results from the day after washing+oil, along with braiding which I started this week:
Overall, it does look a bit better, a bit less stringy, a bit less tangly, a bit less frizzy, a bit less messy, and seemingly with a bit more preserved and defined curles than usual (could be I'm wrong, I'll see how it goes). So for now I'll continue using oil and trying to get out product buildup (which I'm now fairly certain I have, looking at past experiences).
I just want to again say thank you all, you're wonderful.