Several Questions for Editing Text in Mod

To preface, I'm new to this site and Sims 4 Studio in general. I only started to use the program to fix my CC chairs after the bunk bed update and now I like to fiddle with text in mods to make it as similar to the base game as I can. My task right now? Rewriting practically everything that will show up in-game from Nisa's Wicked Perversions to make it, as previously stated, similar to the base game as possible. This means deleting double spaces, fixing grammar to make it more "proper", making sure certain things are appropriately capitalized, and sometimes just rewriting complete strings to make it sound better to me.

A while back, I edited a good bit of text from this mod before its most recent update. It wasn't everything, and it wasn't perfect, but it was good enough for me to not notice any written mistakes or chunky dialogue that might bother me during gameplay. After the update, I tried copying my old text into the new string table, and after a while, I got a good bit through and after two hours I considered myself done, but then when I saved and closed Sims 4 Studio I ended up losing all my progress which made me also lose all motivation to both play Sims 4 or try again. I wanna be able to play again so I'm taking up the task again, but there's three things I'm hoping I can get help with

1. How do I identify which text might go where? (Aka, what text might belong to a moodlet or an aspiration)
2. Does anybody know the rules to text in Sims 4? (Like how some things get capitalized in maybe the traits section, but the same thing doesn't get capitalized in the aspiration goals section. I'd like to know this to make the text as "authentic" as possible)
3. Possibly just rerun with me how to safely save a string table package (I've done it before successfully several times but after last time I don't want to blow it)