You will find that TCH is a VERY friendly place, with lots of people willing to help out! Don't be intimidated by Unix / Linux; you can continue to build your site with whatever you are comfortable with and should have no problem posting it here. If you are using FrontPage, you will be able to use it seamlessly once your domain name propagates (~48 hours or so after you get everything set up). Depending on which VERSION of FrontPage you use, you might encounter a minor problem DURING THAT PERIOD before the name propagates, but you will be fine!
Once you set up an account and start using it, Cpanel, which you will use for managing your account, will be VERY EASY and very intuitive. And if you encounter any problems, you will not find a better bunch of people, from the user community, to the support staff, to Head Guru himself.
Come on in . . . the water is fine and plenty of lifeguards around here!