A few years ago, I was helping with content for a small foundation in my town. Their site at the time was hacked in some way and in a (novice) panic, I got everything redirected to a subdomain to keep everything active. Now they are ramping up their local presence and I am stuck with [subdomain.originaldomain.com](https://subdomain.originaldomain.com) \- i would really love to move everything back functionally to just the [originaldomain.com](https://originaldomain.com) and have a streamlined/clean website. We are on Siteground using WordPress. Where do I start here? Asked Siteground to help me get everything reorganized. Any tutorials I need to look at?
(I am not a web designer, just someone who can find their way around for the most part and have a decent idea of how websites work but have spent many years helping my local colleague as they volunteer a ton of their time for our community)