bro don't waste your breath on exercise. that's pretty normal. I hope so, anyway, because my resting is also around 100 constantly. if you're worried check at the doctor's and you'll be informed if it is normal for someone of your stature and ask them for advice rather than us lol
if you plan to exercise regardless I wouldn't start daily. try it for a couple of days and see if you can actually carry on for the week. or tone down your workout on some days. and we can't really estimate a walk's length without knowing your weight/health situation which is why it's still good to get a quick checkup and tackle 2 birds with one stone
gl