I would say find someone to get started with, maybe you know someone who knows someone, or you can look up community rides, but just finding people who love the sport is inspiring and can help you get on the bike. It can also be intimidating not knowing where to go, so learning good routes from other cyclists makes it easier to start.
I started out on a home-built second-hand carbon bike that cost me about 500 pounds. You don't need an expensive bike, but you need a bike that is good to ride on that will make you actually enjoy riding. For me getting a lightweight bike was key to feel like I was flying even from the start. So getting help in choosing the right bike is also very valuable.
Take some time to look at youtube, learn how to fix your chain if it jumps off, to change a flat tire.
Always bring tools.
Oh and if you feel like you are empty and have no more to give while riding, you most likely just have to eat more and you'll be good to go again.