Kudos for trying to trace! I have to admit that I'm an absolute "short cut" kind of person, and am always perpetually grateful for Inkscape
I think tracing your own artwork is very admirable. I, on the other hand, have zero creativity and have to rely on others - thank goodness I'm surround by a bunch of right-brainers! Anything original, that's done on old school paper is awesome!
I have done my fair share of tracing (what Inkscape isn't able to vecotrize for me), and I kind of suck at it, but at some point, I get tired of tweaking the nodes and just send it to cut to see how good (or bad) it looks. Many of the custom hand-sketched stuff comes out decent, and the results may not be perfect, but the customer is usually just super stoked to see their creation turn into something they will undoubtedly end up plastering everywhere they possibly can. If they complain, I will generally spend more time to clean it up and smooth it out, but most times, they're just grateful that they found someone to do it in the first place. Let me justify the "less than perfect" results by saying that most times it's for family, friends, and/or friends of friends, and I do preface it with, "it's just a rough cut, and it can be smoothed out," and let them decide whether they want to chase down that rabbit hole to pay me for more tweaking time. I will generally provide a few sample at no cost because a lot of times, I do it in my spare time and cutting is not my 'day job.' If it's a company/corporate gig, then yes, I will spend copious amounts of time editing if necessary, and a proof goes out for final approval before I go into mass production.
Pat yourself on the back, because I wouldn't have put forth the effort that you did to create original artwork! (seriously!)