Motivational speaking careers aren't as glamorous as they may appear. You'll have to do a lot of legwork of your own to find clients, and not just any clients, but ones that will pay you for your time and effort.
Considering the low demand for motivational speakers, your odds are pretty small. It's not something that everyone can do either. The fact is, many people who decide to become a motivational speaker aren't successful at it because they don't understand what motivates other humans to act or react in certain ways. Most motivational speakers are self-employed freelancers who seek out their own clients and set their own rates.
You may want to consider becoming one because it's easier to get started then working for an agency or company run by others where you still have a boss looking over your shoulder telling you how much work you should do and when you should do it. Many people don't know where to start when they're trying to become a motivational speaker. It's hard work contacting potential clients on your own without the help of an established agency or company.
But before you give up, realize that motivational speaking is a field that provides plenty of opportunities for success. For example, if you have a degree in business, psychology, or communications, it's possible to build on your existing knowledge to launch a new career in motivational speaking.
Trying to start a motivational speaking business also offers many rewards. For one thing, when you do motivational speaking as a profession, you set your own schedule and choose your own clients. This means that even if you're not ready to devote yourself entirely to motivational speaking and give up your full-time job yet, this may be the perfect solution for you: on the side, you can do motivational speeches for local high schools and businesses as well as churches and community groups. And later on, if your business takes off and requires more of your time and energy, you can devote yourself fully to it.
If you're doing it for the money, however, I want to remind you that it'll be a long road ahead before you start seeing results. But if that's what motivates you, then by all means go for it!