I Need More Time!!!

Don't we all? I recently started an online class on Zen thinking. The first lesson was about zazen, the practice of sitting and breathing. Our instructor suggested that we would get up to 1 hour of zazen with practice. It sounds nice, but I can't imagine sitting still for 1 hour! I did sit zazen for about 10-15 minutes this morning. I have felt good all day and will do it again, but an hour? I really don't think I could spare the time. I have my husband, my dog, exercising, work, 5 classes, JLDOC, 2 book clubs...what have I done to myself?