well theres not much left of it but might be helpful: https://www.mangago.zone/read-manga/mangago_how_to_guide/
Mmmh I don't really have that problem because I'm a serial manga/hwa dropper and there are only like 20 stories I actively keep up with, and when I let something (ongoing) marinate I just reread everything from the beginning once it's finished. HOWEVER there is a way you can keep track of your 'not really actively reading' mangas: just put them in a list and write the chapter you left them at underneath

Can anyone tell how how you guys utilise the website? Like how you organize your mangas, etc.
Also Im I the only one experiencing this: occasionally all of my progress somehow gets deleted. So I would forget which chapter I was on. This is quite frustrating especially for those manga I did not keep up into so when I try to catch up, I would've forgetten which chapter I left on