I'd suggest looking at the FreeBSD Handbook: http://www.freebsd.org/doc/en/books/handbook/

Once you decide to take the plunge, subscribe to the FreeBSD Questions mailing list: http://lists.freebsd.org/mailman/listinfo/freebsd-questions

They have a helpful community. When looking for ports (applications), I start with:

cd /usr/ports
make search key="keyword"

or search FreshPorts.org.

I'm in love with FreeBSD. Hope you like it, too.