Autodesk will be the better one to learn of those two. I have never seen a job posting looking for fusion 360 experience but I have seen them for autocad.

Solidworks would be the most ideal 3D modeling solution and is the most common due to its ability/low barrier rod entry compared to software like catia. Solidworks will sell you a copy for like $90 if you are a student or something low like that.

The important thing is no matter what you use to learn your still learning and that’s 90% of the work. The last 10% can be transferred to any software your willing to tinker with and has the ability to do what you want. If that makes sense at all.