The usual thing is meeting at her house, but some do home visits as well: the main corridor makes it easy to head down toward the center or on toward the east, so travelling isn't an obstacle. If a hotel is what you have in mind, it's agreed the same way, deciding beforehand which area you're going to and at what time.
The first step is reading the whole ad: photos, posted hours and services included. Then you write on WhatsApp and settle it directly with her, with no middlemen. Put the day, the slot and the duration in the same message; it's the fastest way to find out whether she's available and to have everything closed in a couple of replies.
The offering covers the usual and a bit more: short sessions, longer meetings, massage and close-treatment options, the style advertised as girlfriend for a while; there are also ads for companionship on a night out. Each profile sets its terms, and those terms are the ones that apply, whatever you might have pictured before writing.
A practical detail about the neighborhood: in houses whose front opens straight onto the sidewalk, getting in takes two steps, with no exposed doorbell and no visible wait. In those set back behind a garden, the entrance is even more sheltered. In both cases, arriving with the door already identified is all that's needed.