I would definitely try to get some better software than paint if you're going to seriously scan stuff. It's a shame to go through the work only for it to look like crap because of software limitations. I used to use a pirated photoshop and it worked pretty well. I recommend using Wild Words as your font no matter what program you use (you'll have to download it). Also a tip for typesetting, center it (both physically and alignment) and try to form "text diamonds" with the words in the bubbles. It looks far cleaner. A little more effort, but well worth it.
I didn't see the original translation, but the current one definitely isn't terrible. Not HQ level, but readable for sure. Keep up the good work.