To only copy new data from one wb to another wb

[jxj_00]

Hi, I need a code that does the following:

There will be 2 workbooks: WB1, WB2
1. Copy from WB 1 & WB2 but it needs to do 2 things
a. Copy from WB 1, Column 2 to WB2 Column 1 & WB1, Column 3 to WB2, Column 2 & WB1, Column 6 to WB2, Column 3 & WB1, Column 11 to WB2, Column 4 (Copy
starting from WB1, Row 4 to WB2, first empty row (The data starts from row 2)
b. Copy only non-existing data in WB2 (Unique identifier/key is in WB1, Column 2 or WB2, Column 1)

One of the ideas I have is using intersection but I am unsure how to proceed? I am also open to any other solutions.

Thank you in advance!