In general I'd recommend the modern standard android. So just go by the official docs and guides with Kotlin and Android Studio. Thats is not only the most straightforward option in my opinion, but it is easier to ask for help in a discord or search the web. (contrary to what @aluminium suggested by going with older UI and java)
But tbh. it depends what you're prior dev exp is like. You said you have no mobile dev exp, but what about desktop or web? If you feel at home with web frameworks, react native might be way easier for you. Heck, if you have experience with c# and windows gui dev, then blazor or microsoft maui etc.
I agree with @aluminium on the point of multiplatform frameworks being way more complex than native android. Only chose those if you get an advantage out of it like if you are either already familiar with the base concepts/languages or if you want to target multiple platforms.