1- I want to do a small amount of exercise at least five days a week. I have been doing bike riding, weights and walking now for about three weeks and I feel better. I need to turn this into a lifestyle.
2- It is actually becoming fun. I hope it stays that way!
1- It's important to know how much exercise you used to do before that three weeks. If you didn't do much exercise, perhaps it's too hard for your body trying to do exercise 5 days a week, suddenly!!
Anyway, walking you should do everyday. And aout weights you should talk to some expert.
2- of course it's fun. And if you hope to stay that way, you have not to take your wishes (mind) farer than your body can go... you need to go step by step.... and talking with an expert can help you to know how far you must go in your first step.