Welcome! I just looked through the showcase and overall it is pretty good. There are several things to fix however, which are:
 

The esp doesn't need Mainland.esm, Sky_Main.esm, Cyr_Main.esm loaded -- these should be cleaned out using Wyre Mash

Chitin Longbow near the entrance might be better positioned inside a holder or just laid flat somewhere like a table or bench. I have a longbow in real life and balancing it on a bench like that is impossible, it would just fall over.

The paper with the golden kanet on the bench is floating

misc_de_bowl_redware_01 on the dining table should be bled into the table more so that its not balancing on a pencil tip point 

BookSkill_Axe4 is rotated strangely on the bookshelf, it would just sit up straight 

T_De_StonewarePitcher_01 on the bookshelf is floating

T_MwDe_Furn_Vs4Food is bleeding into the ground

furn_de_p_shelf_02 on the top floor should be moved into the wall a little bit so that the connection pieces aren't showing any gaps

com_sack_01 under the bed should be bled more into the ground

the key under the pillow should be under the pillow entirely so that its not obviously showing the bleeding and the player would need to loot the pillow to uncover the key

active_de_p_bed_13 is bleeding too much into the ground

The pathgrid is not correct, some of it is going through furniture and one node is going outside of the house interior, the stairs need more care for the grid also