If you are looking for a platform where you can create design and launch your site yourself, Wix is a great choice.
Wix provide an enormous range of materials to help you, and they have a support team available for contact as well. Their Getting Started information is a great place to start.
You can begin experimenting by creating a free account to get a feel for the templates you can select, and see how easy you find them to edit.
Although you can publish a free site when you're ready, I recommend upgrading to a premium plan (paid hosting) so that you can remove any Wix ads, and link to a custom domain. The plan pricing will vary depending on the functionality you need in the site, but the Combo package is usually the best initial option. That is currently around AUD $180 per year.
I recommend using GoDaddy for domain purchases, but there are options to secure domain names through Wix as well. You can get one free Wix domain with your premium plan.
It is also a good idea to set up a professional business email e.g. firstname.lastname@example.org when you are launching your site and this can be done after securing your domain. Wix make it easy to set this up via Google. This might be around AUD $100 per year, but costs vary depending on set up requirements.
If at any stage you are considering getting design help, take a look at these custom packages.