Welcome to the forum.
For me the choice between Turkey and UK is easy. However, I was borned and raised in a tiny Swedish city and since then I have always felt the bigger warmer motropolitan and the better, so what place is better then Istanbul?
The area around Antalya is great I think even if Antalya in itself is boring. I just love walking on old roman roads and visiting exciting historic sites with some water bottels in 35+ heat. I guess Olympos and Thermessos are my favorites.
Ugg, I just realized that I have not had proper vacation in 2 years.
Anyway, I hope you find a good place to settle and welcome!