Decide your goals- Research and decide how much money you want to make in one year.
Practice safety- Know the type of breed, know the best places to walk that type of dog.
All walking paths are not equal- It's best to walk the dogs in a place calmer. The surrounding environment is important. Midday is not a good time to walk dogs.
Set your own boundaries- Decide whether or not you want to go past just walking the dog. For example taking them to the groom or bathing them yourself.
Start small- If you are good at handling dogs you can walk more than one but if not try starting small by walking one dog at a time
Don't get this job if you don't like dogs.
You need to be a people person and a dog person.
How much charge?
Know how many dogs you can walk at a time.
Know how many times you will walk their dog.
Avoid dogs with bad behavior.