I already had my site posted through another hosting company and have had issues with it so I am looking to use another hosting company. Can i just transfer that site and domain to Zymic or do I need to create a new domain? I rather not have to, but not sure how this works. thanks

if you already have a domain then all you need to do is change the namesrver to ns1.uuuq.com and ns2.uuuq.com. You'll then have to create a free web host account here and add your domain. Then transfer your files.

This is exactly how you do it. You definitely do not need to create a new domain.