The profiles posting in the neighbourhood aren't all alike: some propose short meetings, some offer long sessions with massages, and some work with a warmer dynamic, the kind usually advertised as a girlfriend experience. And some add companionship for an outing to what they offer. The list published in each profile is the reference and it's best not to take anything for granted.
As for where, besides her own place there's the possibility of her travelling to your house or to a hotel in another area. Since the neighbourhood connects well both with the north and with the centre, that outcall is a realistic option and not an exception. Raise it in the first message so you know straight away whether it's within what she does.
Contact goes through nobody else: from the profile you write on WhatsApp to the person who posted the ad and settle it directly with her. A message with the day, the approximate time and the format you prefer is usually enough. If something isn't listed, ask right there instead of assuming it's included.
If you work in or pass through the area, midday is a comfortable slot: the neighbourhood is in full swing, the corner shops have their custom, and a short visit fits easily into a work break. Later on, with everything shut, it's best to go straight in and not linger chatting on the pavement. It's a small detail, but with an empty street it shows.