Arty (((hugs)))
I know I'm still single so maybe I'm not the best person to give advice, but I can tell you that when I used online dating sites, it was definitely a pick up zone. I used to say online dating was like window shopping...people like to look but they can't afford to buy.
So it's really not you, dear, it's the nature of the vehicle you are using to shop with.
The only thing that online dating ever got me was laid. (Which I was very grateful for.) My fiancee that I met online, we met through social media and my blog rather than through a dating site, and we were actually friends for 2 years before we met in person and then things became romantic. (Clarification, we broke it off eventually for a variety of reasons.)
I know it is possible to meet people who are interested in serious relationships online, I do think that maybe it takes a longer though. I also do think that, maybe, and forgive me because this is not meant unkindly but only as a way to give you perspective, the fact that you only work part-time and live with your family still may raise some flags for a good portion of guys. Most guys I know are looking for independent women who control their own lives. That's not saying there's anything wrong with your living or work situation, just saying that some people will judge it a certain way.
Keep kissing those frogs, and remember to also focus on your own self-improvement so that you don't get bored in the meantime. (You've come so far already!)
Good luck,
seesaw