Most coaches cannot sustain a living doing coaching because they are just bad at marketing themselves and getting clients. It has little to do with your coaching skills and more to do with your business and networking skills. Coaching is traditionally a very network-oriented business. You need to be a good networker, or a good online marketer.
I am a bad example of a coach because I don't really coach people and I don't network. I sort of created my own category of online philosopher because I never really cared to be a traditional coach.
If you are a great networker and really hustle, you can certainly make low six figures. But this is highly usual for coaches. Most coaches can't make $20k/year because they don't realize that coaching isn't about coaching, it requires business savvy.
Honestly, it's gonna be tough to be a coach at your age. You're just a bit too young and immature still and people will not take you seriously (and they aren't wrong). You need more life experience and more theoretical foundation. But don't let that discourage you. You can still lay the groundwork now for a coaching career in your late 20's and early 30's.
Don't expect any cookie-cutter formula or coaching programming to land you a 6 figure income. A 6 figure income is only possible through creative, original thinking and lots of hustle, above and beyond what most coaches do.
In the meantime, you can try to find a career which will get you more experience, like counseling students in college or working with substance abuse victims or tutoring teens or some kind of community organizer jobs. Jobs like that can be a good segue into coaching later on, as they allow you to develop people skills and start practicing mentoring.
To be a good coach you have to enjoy working with and mentoring people. You also need to know how to sell people on the value of coaching. People are generally very hesitant to pay hard money for soft advice. You gotta find ways to make coaching very tangible and practice for people. Like, "I can help you save your marriage" or "I can help you double your salary".

You need to find a unique and underserved need in the marketplace and invent a creative and effective solution for it, providing people with massive value.
That is the heart of business. Everything else is distraction. What you eat and when you wake up is irrelevant. Business is a very concrete thing. Try not to muddy that with a bunch of cute self-help ideas or philosophy.
"How can I add massive value to the world??" << that should be your top question when thinking about biz. If you're not adding real concrete massive value, you will not succeed.

@Eric Tarpall
Emotional problems can be resolved only with emotional actions, NOT with logical.

Try to feel your body fully every time you feel a strong emotion like anxiety. Refocus your attention from your mind. There is no shortcut for this - awareness is the key.

However, guess what, awareness is nothing more than pure OBSERVATION without JUDGEMENT.
If you say, I SHOULD NOT feel this way, you already are going too far. If you try to cover one emotion with a reactive behavior, you already are going too far.

Just as an exercise:
When you are home aka “safe”, meditate for at least 15 minutes. After that, trigger yourself intentionally with something that evoke a very strong feeling. For example, look at a rich guy Instagram profile if you are resentful to “rich guys whose life is easy”, for a handsome model because “I think I am ugly and life is unfair”, or w/e provoke you strong feelings. The chances are, you have a lot of these triggers, just pick few.

Then observe.

What’s next you will find for yourself, spoiling it will make the exercise less precious because you will create an expectation. Try this at least 10-20 times with same trigger (depends how deep the belief is rooted into you), but do no force youself to do this 100 times a day. Consistenty, not volume is the key.