I'd also consider myself pretty tech-savvy, but that came from plenty of mistakes growing up including putting malware on the family computer at least twice (mostly ads for these "Pokemon MMOs" back in the mid aughts that were too enticing for my kid brain to refuse ๐ ).
It's very easy for me to forget how much of an outlier my tech experience is among most folks around my age. I had an acquaintance in the first year of college I helped by giving essay advice, and was very surprised to see that the only thing they really knew how to do was basic use of apps on their iPhone. They got a laptop for school, but no computer experience, no keyboard typing experience, and even just the iPhone Settings app was a scary place to be avoided for the most part. To this person, Microsoft Word was a new thing they had to learn on top of everything else. In college. It was also in the South so I don't know if I should be that surprised unfortunately.
Regardless, it was pretty wild to me, but a very real reminder that not everyone has access to the same resources education, and/or experience to draw on.
Anything within a sealed loop such as blood or brain fluid shouldn't be boiling. Your body is pretty good at keeping that stuff inside as long as you don't have any major cuts or something. That said, I don't think even a minor cut suffered in the vacuum could clot or scab without oxygen.
All of the air in any of your orifices would rapidly get sucked out (including from one's butt), and pretty much any liquids exposed to the resulting vacuum would boil. Negative pressure within the body means more room-temp boiling liquids, which then creates more air to get sucked out! It's a feedback loop!
A space-exposed corpse would likely end up quite dehydrated for the above reason.