Creating in 3D, and rounding edges Not corners

This software is not easy to use. I am doing trays and i wanna use my x carve pro to round the edges not my router table seperatly. theres no way to start a 3D project from scratch it only sayes to import a file.

Becaause Easel is not a 3D model creation tool. All you can do is import a STL file of the model.

I’m new to the 3D carving and I don’t know where to go or how to get started for the STL files. Can you help me with this?