Secured credit card and credit

If my credit is 565, and I use my secured credit card for gas, and small purchases, and pay it on time, how long do you think it would take me to build my credit to around 650?

Sorry, I’m new at this and really don’t know what I’m doing 😅

The negative marks on my credit report should be removed within the next year, because it’s a health bill my insurance was supposed to pay on. :/ but not sure when that will happen. Any advice is appreciated though ❤️