3D printing is a fun hobby. Sometimes i print toys for my kids. The biggest benefit is that they learn patience.

Prusa MK2 / MK2.5 / MK3 are decent printers, and are advanced enough to not to worry much about it. If you can afford MK3 go for it. I'd recommend the Kit so that while assembling it you get to learn how it works.

For modelling another options is OpenSCAD. It is very different form other tools. It lets you design 3D figures using textural declarations. Its harder to use in the beginning but makes it easier to modify designs and be very precise in measurements.

PLA material has no fumes.