Did the same recently, installed Windows 10 on an external USB-C disk.

Documented it here, if it helps anyway: https://gist.github.com/ArjanAssink/09e46937a8e355044c87ce59...

The 5300M is a low-end GPU though and it will struggle on anything close to the native screen resolution. Even the top-end configuration will have issues running this game at native resolution to achieve sharp UI and visuals.

Yeah, due to the way I was buying the laptop (it was a replacement for my 2017 which failed three times, which they let me upgrade) the 5500m would have been quite an expensive upgrade, can’t remember specifics but it was something to do with equivalent spec for my old machine - I was just relieved they were replacing it so didn’t argue - but I did also figure that the difference between the two wasn’t likely to be enough to make a really significant difference (between unplayable and playable for example) if I did ever fancy trying the odd game.

I for sure didn't imply it would run smoothly on 1920p, that's a high bar for a MacBook.

Using lower res is not the end of the world imho, I do it on iMac all the time.

I had pretty poor experience running at lower resolutions on my MacBook - macOS exposes a very strange set of resolutions which are either too small (causing very obvious pixelation and poorly readable text) or too big (causing unplayable performance even in strategy games).

Yeah, I play most games in Windows via Boot Camp. MS Flight Simulator which the op asked about is not available for macOS anyway.