I’m not a photographer but they all will say you’re going to want to start with a 50mm prime. Every system has one that’s high quality and relatively inexpensive. You should learn on it. Get to understand shooting, framing, lighting, etc without the crutch of a zoom lens.
Shield is stuck with the new UI too (tho alternative launchers can be installed). Honestly it doesn’t bother me as much as other people tho