Okay I figured out how to give half-elves their PHB ability of pick any two skills. Thanks to Helios2216 for pointing me in the correct direction.
You will need to edit Progressions.lsx [I will include the tweaked version in the code window.]
You will need to place the file in the following location you will have to create the folders if you haven't already tweaked any files yet.
Okay the progressions.lsx file is too large to add it to a post. Sorry
[Note] Why is the following file given a password? Because I am falling these instructions
"***NOTE*** If you are going to upload zip/rar/7zip etc (not CTs) files, password-protect them then upload it or it will be deleted!. If you wish to attach one or more files enter the details below. You may also attach files by dragging and dropping them in the message box."
password is 1234
1) unzip the file Password is 1234
2) Make the following folders to create this path and place the file here...
\Baldurs Gate 3\Data\Public\Shared\Progressions\Progressions.lsx
This file allows for a lot of tweaking you can change how many skills picks a class gets(but not what skills you can pick see my pervious post a single page back on how to do that.)
I was able to find the Githyanki racial ability to pick any skill and added that to the halfelf and added an additional skill pick. If this githyanki ability gets change then this tweak doesn't work as it is applying a different races ability to the half-elf. I haven't figured out how to add the ability independently.
I hope this helps players making half-elves a bit more PHB friendly. I hope the instructions are clear enough for newer players to game tweaking/modding.