I have never packaged a game before , I’m Planning to publish for android , the map size is 550*500 yard ( real world scale) its a simple walkthrough game , I have modeled 80% of the assets "lowpoly , some of them with 4k texture ( I know , don’t need that texture size for android )
1- how much should be the package size? 2 - what I should keep in mind?
to figure out the package size of your current project you can use the Size Map pick an asset in your Content Browser, Right click it and select “Size Map” this will show you the “Size on Disk” for the given asset and anything it references. to get the best picture you should probably pick things like the Levels
keep in mind that this Size map is not exactly 1-to-1 with the full packaged version, of for your situation the APK.
the details you have given are both “size on Disk” considerations as well as runtime. the Models typically are low footprints, where the textures are the bigger impact. size of the Map only really impacts the size of numbers, which are just doubles so not that much impact at all.
what will have performance impact is number of Actors, and complexity of logic and animations.