So I have decided to be strict with myself to make a change as I haven't exercised in about 11 years and I'm extremely unfit. I started my first workout today and at the minute I can only manage 10-15 mins of a workout before I need to stop also I'm at a slower pace than the instructor but trying to be as energetic as possible. I plan to do 15 mins every weekday, how long should it take for me to improve as I'd love to complete the 40mins workout without struggling.
Also any tips for motivation would be welcomed as that's my biggest problem is getting up and doing it in the first place.