Help importing file

i bought the file for this frame and trying to import in easel to carve on x carve but cant seem to. looking for suggestions

Easel can’t generate toolpaths for 3D files.
You’ll have to use something else.

Try this Fusion360. It seems to be the popular one these days. There will be a learning curve.

You need a program that can generate machining files (CAM operation) from an STL-file.
Fusion360 can do that but it has a steep learning curve.

A simpler approach may be MeshCAM - https://www.youtube.com/watch?v=d-82qFQGETo
Vectric might also?