Easiest Mac software for posing 3D character models?

[Rainvillain]

Hi,

I'm hoping to incorporate some basic, low poly silhouettes of 3D character models into VN's background shots.
I have zero experience with any sort of 3D modelling so I'm hoping to purchase/commission a few simple 3D models, which I would then superimpose and pose on my existing BGs, and then essentially export this shot as a PNG. OK, the whole process has several more steps, but that's the gist of what I'm doing.

My problem is I've never purchased/commissioned rigged, low poly character models before and I'm not too sure how to proceed. Specifically, I would need the assets to be rigged and for me to be able to open them in software that runs on Mac so that I could then pose them and create 2D art out of them.

Is there specific software that works on Mac and is relatively easy to use as far as: importing 3D models, posing them, exporting them as PNGs?
Thanks

[axurias]

https://www.youtube.com/watch?v=AS2SlYE24yA

get blender, you can download it through site or you can get it VIA steam (and its FREE).
the video above is a guide how to export 3D image as a 2D image (PNG)/
you can commish artist to make a 3D character for you, AND you can get them to rig it, or just go to mixamo.com for an automated easy rigging (5 minutes at most)

[ThrashNeon]

DAZ Studio is free and will do everything you need (and a lot more).
https://www.daz3d.com/
It comes with rigged models that you can easily pose and it renders pngs with transparent backgrounds by default.