Each session takes about 60 to 75 minutes, 5 days a week.
How do I know when to add weight?
When you can complete every set at the top of the rep range with good form, add a small amount of weight (about 2.5 kg for upper body and 5 kg for lower body) and start again at the bottom of the range.
What if I miss a session?
Just pick up where you left off. Do not double up to make up for it. Consistency over months matters far more than any single week.
General information, not medical advice. Learn each movement with light weight first, stop if something hurts, and see a doctor or physiotherapist if you have an injury, a health condition or are pregnant.