Fusion 360 is a good 3D package to learn.Will you be using Fusion360?
I am a mechanical design engineer and use Solidworks 8 hours a day.
Fusion 360 was quite easy to adapt to.
A lot of companies are now giving there software away for free
Another free 3D package is Onshape which is very similar to Solidworks (it was designed by ex-Solidworks people)
The advantage of Onshape is that it is also available on mobile devices and is fully usable on those platforms.
I have sat in my armchair and drawn 3D objects up for my 3D printer on my IPad in Onshape
Andy