Just got my first 3d printer 2 days ago. Had a quick question about overhangs.

I’m in the process of printing this model from thingiverse. https://www.thingiverse.com/thing:4125551/

There’s an overhang for where the lid slides in on the top. My question is.. should I enable supports for this or is it ok to not bec it is so small?

Also… is there any other place I can get professional grade models? (even for a price) aside from thingiverse?

Last, sorry, I really have a ton of questions but I can research them. For this I also would appreciate first hand info from the community… what 3d modeling software have you found easy to use. (I tried tinkercad but it is a bit clunky. (and dimensions change when you tilt a shape, cut it, and bring back the 2 halves to their original orientation)