Well most replies already suggested a LLM but good old fashioned search skills work fine too.
For simple questions, as long as you know the correct terminology that is relevant, just asking the question of a search engine is usually good enough to turn up articles or stack overflow answers that'll help
If you don't know the terminology or you struggle to ask a precise question despite your knowledge, going up one level , so to speak, and consuming more information about the stuff in the immediate context, can often either fill in the gaps to allow you to ask the right question, or sometimes it's the missing bit of info you didn't know you needed to solve your actual problem.
Pardon me for sounding like an armchair psychologist here, but it seems to me like you have fallen down some weird rabbit hole where you are excusing your creepy behavior patterns with this concept of privacy. I suggest you take an honest look at how you behaved in this interaction, because "privacy loving" is neither a cause or justification for what you described doing in the OP.
If you really believe that, then tough shit: you can't have your cake and eat it too. You chose to stay off insta and snap, so you have to accept the consequences of that choice. Your decision to try to spin up a burner account and hastily attempt to make it look legitimate was stalker-tier behavior. Not to mention that painting a whole class of people with such a broad brush as "no one is willing to share their number anymore" is dangerously close to incel bullshit all on its own. It is far more likely that no one is willing to share their number with you because you are pushing to get too familiar too quickly and they are rightly picking up on the major red flags.
The appropriate response would have been to be honest about not using it (and in general being honest is ALWAYS THE RIGHT MOVE when you're meeting people, so long as sharing wouldn't put your safety at undue risk), and to accept the odds of the weird stare you expect to get.
Because everyone is a unique person, and you don't actually know when you're going to run into someone with similar views as you about privacy, if that is really your true concern. But it seems like your desperation overrode whatever principles you purport to have in that moment. Changing who you are to try and get in someone's good books is fundamentally manipulative and is a serious problem. You are never going to be capable of a healthy relationship until you nip that in the bud.
It sounds like you are young, so the good news is that most people have been a fucking idiot in this regard at one point or another, and it's easily fixed! Accept that you fucked this up and take an honest look at how you approach interaction with others, and you will already be farther along the path to normal social relations than you think.