I forgot one more mod : You need to change Gale's voice to female. There are a few versions that you can use here :
https://www.nexusmods.com/baldursgate3/mods/2702I used voice style A myself.You can find YT vids where you can listen to all of them and select the one you like most.
Some further encouragement :
Before BG3 I never installed a mod for any game, so it was all a completely unknown for me also. It turned out to be quite straightforward and I have about sixty mods active now. Here are a few tips to get started :
In order to install Nexus mods, there are 2 ways. One is a tool from Nexus itself, which is called Vortex. People who use this say it automates and simplifies everything. People who don't use it say it often makes wrong decisions and screws up. I don't knowh how good it is, because I only used the other, more manual way with the BG3 mod manager.
That is an executable you can download, and I suggest you check out one or a few youtube video's that explain the interface. They're not long video's, it really isn't rocket science.
When you get BG3MM running, you can use this program to download and install script extender (in the menubar "tools" item). That will also automatically update it if needed.
Then you're all set up to install your mods. Go to the mod page in Nexus, read the description attentively, as well as the requirements. Then go to the "files" tab and download the file(s) needed to your PC. Normally these are .pak or .zip files.
So my procedure is then to click on BG3MM menu "file->import mod", select the downloaded files. The names of the mods now appear in the right pane of BG3MM.
Then to activte them, you drag them from the right to the left pane and set the loading order right. Mods are loaded one after the other, so if there are dependencies or overrides then you need to drag themup and down in the list. For the 3 mods you need I don't think it's a thing, but I would put the enhanced edit mods first and the galepal mod after them. The voice mod is a bit special, it goes directly to an override section. No need to do anyhthing more for it.
Then, and this is the thing that most beginners (me included) forget, you must go in menu "file" and click "save order" and espcecially "export order to game". If you forget that last one nothing will happen.
And that's it. Just one more thing. I said it before, but can't repeat it enough : Read the description. Nothing so annoying for the modders as users that complain there's a bug, it's not working, but they didn't do what the description told them to do.
With the mod installed, Gale automatically gets the female body type 1 and the standard mods look. With the enhanced edit mod you can remodel it immediately. You don't need to go to the magic mirror. There's an icon in your command bar that you can click at any place to start the procedure.
In my current PT, I have a normal Tav, but run an all female squad, so these are (from LTR) Wyll, Astarion and Gale.