First time going to the hospital alone

This will be my first time going to the hospital alone as an adult. Nakakahiya pero idk where to start and I don't have anyone to ask irl.

I have to get the chickenpox vaccine asap dahil I had close contact with someone na meron. My questions are: (1) Sa outpatient ba ito? Nakakahiya pero di ko talaga alam concepts ng mga ganap sa ospital. (2) May available kaya na discounted vaccine sa public hospital? (ie. PGH, San Lazaro, Jose Reyes) (3) If private hospital, saan kaya may cheapest within or near Manila?

If this is the wrong sub/flair, the mods can take down my post. TIA sa mga sasagot, hopefully meron 🙏