There is no cost to use the database. Registering is not required. You should be able to browse the database and click through the links. Having said that, considering the fact there are so many browsers out there being used, this site's software might not allow some visitors to browse, it all depends on the Internet traffic, and your browser's compatibility.
The procedure is very easy to understand and follow for anyone with a little woodworking knowledge. Make sure to collect all the items you need before you start with the project. You may even ask Tracy your queries directly in the comment section of the tutorial post. Or you can ask them here. Either way, I hope that you manage to build this one nicely.