Continuing the discussion from Welcome to our forums! Please introduce yourself 
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@jimisbell, best to start a new thread.
What file formats does FlashForge accept? Answering that question will get you a long way toward figuring out what software you’ll need to use.
According to the Flashprint (FlashForge’s printer driver app) “User Guider”,
You can load into .stl, .obj, .fpp ,.3mf, .png, .jpg, .jpeg, .slc or .bmp model files which are editable in the software
SketchUp can export a model in .stl or .obj format for input to the printer.