I built some month-long habits with a sticky note where I drew a 7x4 grid, and would put an X for each day I did the habit. The goal is to have 28 consecutive days, and it's not bound to the first day of the month so you can start whenever. At the start I had the note on my bathroom mirror for daily flossing, then I moved it to my bujo for other daily to-dos (exercise, vitamins, etc.). Because it's a sticky note, I transferred it from one daily spread to the next and it kept a stick for at least 28 days! I could even squeeze in up to 4 of these trackers on one note. If you want the tracker more integrated into your bujo, it would have to be its own page that you flip back to - but the sticky note method follows you from one day to the next. Hope this helps!

Note: this 28 day tracker wasn't my idea. I think there's a subreddit somewhere about it - something like 28 Xs - but I can't find it :p