Hey, total noob here. I've been free of Windows and using Mint for a whooping 2 days. It's been great. I work on text docs 7 hours a day. Libre Office didn't mesh with Mint, and I'm using OnlyOffice. It's perfect for my needs. BUT.

Back on Word, I had Autocorrect customized with shortcuts for phrases I use a lot. It's a feature I absolutely need. I can't find it in OnlyOffice. For maths, yes. For text, nothing.
There must be a plugin, a script (not sure what scripts are, tbh), something.

I'm not talking about autocomplete (I don't want it to list words I might be typing, I want it to insert "Hello world" as soon as I type "hh" or whatever.)

Please?