I already have FDE setup. Then as an extra measure I store notes in EncryptPad[0]. All my badly written poetry, TODOs, and hopes and dreams are in there.

[0] https://evpo.net/encryptpad/

I did on and off for months but slowly stopped due to no self discipline. I wish I did a daily entry faithfully. Now that I am older I missed a lot of valuable entries and forgot many memories in my head

Sorta. My disk is encrypted by a key only I know, and I have a journal on it in Logseq.