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Hi Parker,
What AutoCAD version are you using?
If it is 2020, then you can use Blocks palette (Block libraries tab) to insert blocks ("figures") to your drawings.
https://help.autodesk.com/view/ACDMAC/2020/ENU/?guid=GUID-09389064-395E-4D18-99CF-7F6C18718EF3But at first, you need to create your own block libraries with floor plan symbols.
You can find a lot of free blocks over the Internet, for example here:
https://www.cadforum.cz/catalog_en/
