Any suggestions for amount of time to study everyday to go from basic Alg knowledge to where I'd need to be for calculus?

I'm not sure what a realistic amount of time is for this is, but I'm looking to aim in the span of 6 months to 12 years. Self taught.

I'm currently failing my pre college algebra course, as I've neglected/cheated in math for years, but I was sorta good at Algebra 1 when I could do it. Always struggled with geometry. Have a pretty bad memory.

Never the case, I want to get decent enough at all of these to open up more options for my future. I guess I'm looking for anyone whose done this themselves and wondering how long it took as a base idea for myself.