Other users have toughened it out. Though I have no experience of either resetting or getting back on the WK train after an absence.
I think you just have to be honest with yourself here: choose what you think you have a better chance of success at. Either way it’s gonna take effort and work.
Do you have user scripts to help you dealing with those items you’ve forgotten? 
Before resetting I would go there. For example, get the Item Inspector to see which Items you’re failing and use the Self-Study Quiz to do some intensive training of them. Until they stick.
You might be able to avoid resetting that way. 
I think you can do it! Ganbatte! ^^
