Adding in 2 cents.
I agree with everyone else here- it's good, solid advice.
The rule of thumb for your exercising is that you don't want to increase your workload by more than 10% of your previous week. So (for instance), if you ride 10 km for 5 days last week, you can add in an additional 10% of distance. That means that this week, you can ride 11km. The next week, you can increase by 10% again, and you'd be riding (approx.) 12.1 km. And so on, and so on... hopefully this makes sense.
You want to get your body to adapt to increased load over time to prevent injury, burnout, overtraining, etc.
Good luck!
Koffee