Need some advice on Text edits please

Hello, im fairly familiar with Assetmanager and know how to edit most of the stuff i like to change and i know how to handle gdx1 etc… I also am aware that textedits are linked via string (for example SkillDisplayName or SkillBaseDescription) and i do know that these are found under resources\text_en… But here my knowledge stops. How do i edit these? Do i have to rebuild assets out of them (after textediting them i assume) and how would i do it? For expansionfiles (gdx1 etc) how do i unpack those arc files? I tried to read up but failed so far to find a tutorial with easy to understand step by step directions (at least for me…). Is there one? So please point me towards it or if not be so kind and explain it to me here if you can. Sadly a lot of links do not work for me since they just lead me to the general CRATE homepage now (I guess the forum changed over the past few years). Thx in advance…