Should I take 18 credits both of these semesters to make sure I graduate on time?

So I’m (M21) about to start my classes again for my sophomore year and pretty much last year I was doing 12 a semester because I was a bit wired of how I could handle college work since it was freshman year

Now if I wanna graduate on time I gotta do 18 this semester and 18 next semester and I’m doing the classes all online for my AA. I’m Tina have a full time job in about a month or month in a half. What should I do?