What kind of framework, programming language should I use for developing this app?

  android, augmented-reality, flutter, ios, unity3d

I got an idea I think it’s cool.
Although I’ve never been a good programmer so far(almost starter), I’ve decided to learn how to develop applications and realize my idea to reality on my own. (Of course, at some point, I’d need somebody else’s help like design stuff of sorts).

The problem is, I don’t know what kind of framework, tools I need.

Here are two main features I wanna develop

  1. AR app => user can see whether fashionable stuff like shoes, clothes fit their body over the phone through AR object. –> Face, body tracking
  2. I wanna develop for Android and iOS. Preferably using the cross platform.

During my research, some people recommended Flutter + Firebase(Face tracking AI API), Flutter + Unity. On the other hand, Some told me don’t go for Flutter as I have to end up developing AR features for each OS(Android, iOS).
Kinda confusing.

I was going to develop this app using Unity + flutter, but I thought it would be a good idea to ask folks here before I decide what to do. Please consider I am not an experienced programmer. (it’s been just a few weeks since I started an AR app course with Unity on Udemy…) But I really want to give it a shot.

Any advice will highly be appreciated, guys.

Source: Android Questions