I tried a lot of things. Markdown based apps (Obsidian), Diary apps (Diarium), and so on.
What worked finally was pen and paper. Not any pen. Bought a bunch of good fountain pens (Lamy, Pilot, Parker), and bought a nice refillable leatherbound journal.
And I journal every night before my meditation session before going to bed.
I do not plan to read them or store them. I just write my heart out. I use writing as a tool of thinking, and dumping my thoughts. The stuff that have some particular qualities, evolve into actions (anywhere from visiting a friend or a travel trip to learning something new), blogs, or projects.
I do not plan to do OCR or any kind of special storage.
I hated digital journaling because I had to pick up the phone or sit somewhere to use the laptop/desktop. Also a quick figure would require me to at least open a tool, and at most made me connect my graphics tablet. Pen and paper just removed the friction. Now I just journal in bed sitting or half-lying under a lamp with my wifi turned off.
Pen and paper is my ideal workflow, and I reached here after months of trial-and-error.