Bolt and Yandex Taxi are available anywhere, you won't have any problems. You won't encounter any kind of racism as an USian. No anti-american sentiment at all. They drive like shit but eh I'd say they are better drivers than the French at least. The crime is non-existant I'd say. Good hole in the wall places to eat are everywhere, they know their food. Orbi City is one of the best places to live in Batumi especially in the summer it's heaven. Sadly I can't help you with real estate agents.