Create and Track activity threads from every day journals

Our daily routine is filled with various activities like trying to get fit, working on a book, new home purchase etc, office project etc.
I take my notes around these activities in my daily notes. Some of these activities are significant and so I create a separate note for them and link the to the daily notes. But some of them are simply musings, simple thoughts, or simple updates. I am looking at a system/process that can be used to track this threads/activities spread across multiple notes. And this process should be different from creating seperate note for each activity

e.g Home Purchase
day 1 - thought of buying a house
day 2 - saw some properties but didn’t like
day 10 - saw a property and liked it
day 11 - talking to bank

I want this thread to connect to all the individual daily notes.
Any suggestions…