Being a dental receptionist was easy enough. While there are dentistry courses you can take that is a reward for advanced dental admission, most dental receptionists are trained for the job, although some companies also allow receptionists to study on the job.
Most dental offices want to hire a receptionist who is experienced in reception work and is aware of dental administration. So, if you can realize how bad some people think dentists are, be warm and friendly, and hopefully reassure them, then you've taken the first step towards becoming a dentist!
You are also expected to be computer literate and have access to patient records, keep current records, and maintain a patient/customer reservation system. It also requires you to have a good understanding of the English language and is relatively uncountable as you may have to deal with money and bills.
Many dental receptionists are responsible for a senior receptionist who instructs them in the training process. This means that you study on the job and don't have to spend a lot of time studying.
If this is a career that interests you, why not talk to a recruiting agency to see if they can take you to the dental office so you can see for yourself if this is a career you'd like to make progress on. ? At least if you do this through an agency you can try it out before taking a permanent position. Then you can also decide if you want to work in a large or small practice.