My free subdomain is trying to redirect me to a domain I tried adding

[Admin]

Well, for starters, you will need to add the .com domain to your account here. This is how you can do that:

How to add your own domain to your account

While a free subdomain is a great way to get started, a website looks a lot more professional with a custom domain name. Fortunately, you can register your own domain name with an external company (like NameSilo) and use it on InfinityFree. There are multiple ways you can add the domain name as an account. You can create it as a new account or add it to an existing account. Before you start: configure your domain’s nameservers Before you can add the domain name to your account, you need to ver…

Seeing how you want to use an existing site, I recommend adding your domain as as Parked Domain to your account, making it an alias of your free subdomain.

After that, you can just change the site URL through the WordPress admin panel.