It all adds up over time! Dose increases should really follow actual progress rather than some fixed calendar anyway, that's the approach I'm taking too. Great start, keep it up!
Nothing intense exercise-wise, just stay active at my job instead of parked in a chair the whole shift, usually hitting 5 to 7 thousand steps daily. Lift some 10 pound weights three or four times a week and get in a 3 mile walk on the weekend.
Started out with just five minutes of walking daily since I was completely out of shape. Felt wrecked afterward even from that short stretch. Real reality check. Just do whatever's manageable, but push for a bit of discomfort so you're gradually adding time or pace over time.