I started around the same time as you. I rode to work one way for a month every other day. On the 2nd month, I rode to work every other day (3 times a week) both directions. On the third month, I started riding four times a week both directions. I view cycling as commuting/lifestyle as opposed to fitness. I have lost 20 lbs and my insulin dosage has been dropped 50% by my doctor. This week, I rode three days in a row and feel stronger. I took a day off and will ride tomorrow due to schedule change tomorrow. You can do it! Gradual change is better.