Think about your goals for homeschooling. That should reassure you that you're doing fine.
My goals are to have a happy, healthy (mentally and physically) child who progresses and likes to learn. Granted those are my goals and not yours, but FWIW, it sounds to me like you're hitting all of that quite nicely.
A couple of hours a day is usually plenty for an early- to mid-level elementary student if he's covering the material efficiently and being sufficiently challenged. We usually take longer than that for DS8, but he's sloooooooow-moving!
Keep up the good work!
