Unable to get desired result using georeferencing (QGIS tool)

I was trying to map indoors for my college and for that was using QGIS tool. I tried adding the raster layer to osm map in order to mark the floor plan as a layer of georeferencer but the out put that i get is something like this and the building from osm map layer look like this along with points mapped and the floor plan used is this and zoom out of the these two layers look like this my main aim is to get geojson in order to map it on indoor section of osm

Looking forward any sort of help

Thank you for helping!! cheers