I found this https://improviseforreal.com/ . There is a book available from the library https://find.minlib.net/iii/encore/record/C__Rb3144494__S%28improvise%20for%20real%29%20__Orightresult__U__X7?lang=eng&suite=cobalt and they have a YT channel https://www.youtube.com/c/ImproviseForReal .
Do not be intimidated by "improvisation". This author says, and I tend to agree, that sheet music, terminology, like "Csharp diminished" or "augmented D" only get in the way of you relating to the music you already know and love. And know how to hum the tune, if not sing out loud, even in the shower.
If you want to talk about it let me know. There is a bit of work involved, actually more self-knowledge and self discovery than ingesting external information. Try some of the YT videos.
There is a playlist https://www.youtube.com/playlist?list=PLKcDMiL591sPQxJ4DS7el0InPxmQk-O7V "Piano for non-pianists" which is great.
