Question

According to the application developer (Autodesk), AutoCAD 2017 and above are compatible with the macOS Mojave 10.14.

https://knowledge.autodesk.com/support/autocad-for-mac/learn-explore/caas/sfdcarticles/sfdcarticles/autocad-and-mac-os-mojave-compatibility.html

You'll want to check out their support site or contact them directly if you need more details, but it soundalike you should be fine unless you're wanting to run an older version of the application.

Here are the requirements for AutoCAD for Mac 2019. Consider the MacBook AIr Retina (Late-2018) and the configuration offered by dialabrain. AutoCAD for Mac 2017 is compatible with Mojave only if it is the full AutoCAD LT 2017.3 Update, which fixes Mojave compatibility issues.

Yes. I would recommended getting it with 16GB RAM and at least a 256GB SSD.