[_alternator_]

Let’s be clear about what endorsement for arXiv means here. You either need a validated email address (eg most .edu’s) or an endorsement from someone who has one to get a paper on arXiv. It’s a simple gate that helps keep arXiv relatively free from spam, but it’s not peer review.

I view it as nice that you’ve got someone serious who thinks the work is worth posting to arXiv, but the endorsement bar is generally quite low. I’d encourage you to send it to a journal (Didier might be able to recommend an appropriate venue) and really engage with the process and community. I’ve found that process to be extremely valuable (and humbling).