You obviously put in a lot of personal study, I don't think you would gain much of anything out of an undergrad philosophy degree at this point - but it was definitely an excellent place for me to be mentally out of highschool.
Buddhism is maybe the best philosophic basis of them all, and you're more expert in it than I am. If there are two things I walked away from philosophy with that I would recommend - it's formal logic, and Nietzsche. You're a programmer, so I suspect your logic is at least as good as my undergraduate philosophy experience - logic gates versus deductive logic are pretty much just different perspectives on the same thing. Still, that was very influential on me.
If there is one philosopher though I would recommend - it has to be Nietzsche - whether you love, hate, agree or disagree with his assertions - he is the most influential philosopher in the modern Western world without rival. Virtually every major geopolitical event in the last 100 years in the Western world is traceable back to - if not Nietzsche directly - other authors who were clearly trying to interpret and apply his ideology.
If I were the head of a philosophy department, I would spend the entire first year on critical thinking and logic. Not only do I think those are essential skills and wasting any time on anything else is only going to slow the rest of the program - but putting all of the hard/boring stuff upfront will weed out anyone who can't cut it - let's them get out early - because all the philosophy dropouts/major switchers I saw were due to 3rd and 4th year logic.
With subsequent years, I would pretty much ignore all the old Greeks except Aristotle (maybe lump the rest into one week of one class at the start for context, but that's about it), maybe have to touch on like Descartes for a week or two - but skip Kant entirely he's a waste of everyone's time. Then get right into French Enlightenment with Voltaire and friends (which leads into Scottish Enlightenment, etc), slap some Schopenhauer in there, lead that into Nietzsche. There probably needs to be an Eastern traditions parallel set of classes going on, with Lao Tzu, Confucius, Nanak Dev, Rumi etc early on - that all lead into Buddhism.
The entire 4th year would just be Nietzsche and Buddhism.
There is lots of good stuff to learn in there - but really by having the basis in logic that you do - and by skipping directly to your adapted version of Buddhism - you for the most part saved yourself four years of study that I had to go through the long way