YES,
You can place the mage on your plan and just trace it with line tool, walls etcIf the drawing is not to scale, you can either resize the tracing to a known dimension and check it against the known original or save your Jpeg as a bitmap, greyscale and and resize it to scale in ArchiCAD and then trace it.
This has been discussed quite a bit on this forum earlier. You may want to search it.
Jacek
jacek lisiewicz
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arkhos-tekton, architects
carmichael, ca
Mac OS X 10.15.5
IMac Retina 5K, Intel Core I7
32 GIG Memory, AMD Radeon R9
ArchiCAD 24