Quoted from Meshcam website; "MeshCAM lets you create toolpaths from your 3D files quickly and easily. No CNC experience is required- you can be cutting parts in minutes."
I don't know what limitations the trial version has, but I would suggest That you start by reading through the manual.
I use Rhinocam myself. That is a plug in that integrates fully to Rhino. I had no previous experience with code or toolpaths, but reading manuals, tutorials, help files, and a lot of fiddling makes me feel that I have come a long way the last half year.
Or even better; try to find someone in your area to show you the basics.