Can someone help with this credit question?

Jessica
I've made some bad decisions and missed paying my student loan in the past. I'm current on my payments and have been for about 1 year. Have two secured credit cards, my score is still low at 570. I'm wondering if I just keep paying on time and keep utilization low, will my score increase or do I need to start applying for more credit? I'm being really hopeful and saving $1000 monthly towards a down payment on a home and would like to purchase one in 6 months-1 year. Is this even possible? Thank you so much for viewing!