One thing you might want to consider is getting a Practice Management System so you're suitably prepared and compliant from the outset.
Our simple cloud-based software WriteUpp allows you to manage all the aspects of your practice, including patient records, billing and business management. We have also recently introduced online booking for clients and SMS reminders to encourage new clients and retain old ones.
You can trial WriteUpp for free for 30 days with no credit card or obligation. Pricing starts from £14.95/month. I hope this is helpful!