I agree with Sue that you should obtain your certification first before marketing your services. Given that you will be new to coaching, perhaps you can invite friends and family to participate in your services once you get your certification. Then, you may feel more comfortable marketing yourself.
As for determining packages and structure, you may be able to get an idea of a fee structure from what others are charging in your area. The same would go for developing packages.
One thing I would recommend is to even make connections in your area with other health coaching professionals. You can even do informational interviews to gain more knowledge. I did this few years ago and it was very helpful as I started more health coaching.
Also, just to add one more thing when considering your pricing. Although you will be new to coaching, when you go to determine your own individual pricing don’t underestimate your value. It is easy to want to discount your services, which may be good for a starter package, etc.—but don’t discount too heavily. You want to be competitive, but if you heavily discount this could devalue your services.
It can sometimes be tricky to get the right price point! 🙂
Are you already a personal trainer adding on a well-coaching certification on top of that, or is that going to be your main certification?
My thought would be to set your prices based on slightly below average in your area. Let’s say in your area that’s $50 an hour. If you’re going to give a discount to get practicing, don’t say your price is $40 an hour. Say that the first 10 clients will get a discount of 20% off of your regular hourly rate of $50 per hour. That way, you’re not permanently stuck at $40 per hour.