The SeeMeCNC is an excellent machine. SeeMeCNC has plenty of Youtube videos and an excellent user forum. The good news is your printer is working and now all you have to do is tell it what to print.

Download an item from Thingiverse. Load it into Repetier-Host, Slice it with Slic3r, and upload that file to your SD Card.

SeeMeCNC has the manual on thier site,a nd you can defintiely follow that for your first new print. Then, as you learn what the settings are for, you can get faster and better prints.