Copy and paste layer into another layer in selected location? “Not the TOP”

I am “kinda” new to illustrator and I must say "Sorry community" it has the most god-awful layer/selection tools on the face of the planet. I use 3D applications and they are 100 times better for spline selection. Why you can't just drag a layer from another document and you must only use " paste remembered layers" is beyond me.🤷‍♂ So………… I hope you guys have an answer for this because I can't figure it out. 🙏 When you have a layer with an S ton of “ish” in it like rendered cad files for technical illustrations. So here comes my question for the love of all that is vector. How can I copy another layer  “paste in place” it onto a different one and not have to painfully drag it from the top to a selected area in a new one. So I am looking for a “Copy from another layer” then quickly scroll to the areas I want it pasted in and when I hit paste it puts that turd there.

Thanks in advance and sorry had to vent go easy please….