This is all one job, right, not two different jobs that would be on different schedule Cs?
Instructions and a diagram are included in chapter 4 of publication 463.
https://www.irs.gov/forms-pubs/about-publication-463
It will be important to determine if your home is your "principal place of business" or the therapy site. If you have no other regular place of business, your home can be your main place of work if that is where you do scheduling, billing, and other administrative tasks. If your home is your principal place of business, you can deduct miles to other locations. But if the therapy site is your principal place of business, you can't deduct mileage to the site in the morning or back home in the afternoon, both are your commute. You could deduct other work-related mileage (such as to other temporary work locations, seeing a client at home, etc.)
Principal place of business is separately defined in publication 587. You don't need to meet all the rules to take the home office deduction, but you must meet the principal place of business portion of the home office rule in order to deduct most of your mileage.
https://www.irs.gov/publications/p587
From your example (5 hours a day at the therapy site) I think that is going to be your principal place of business and none of your daily mileage is deductible, but that is ultimately for you to determine.
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