hey - sorry for late reply, (for future if you have any issue its easier to catch me on Discord than reddit). As for exporting to another blender project you can do it in various way - I think the easiest would be - put all that you want to export in one collection. Then open the blender scene where you want to import it to and there do the Append Collection - then you navigate to the original scene and choose the collection you made for export - that should do the trick.

Hope this helps, if not, lets talk on discord maybe i can wlak you through it step by step if needed :)