To clarify, that is 30 feet of fly line outside the rod tip. For rank beginners, I suggest going up one line size and our TU chapter use 6 wt lines on 5 wt rods to teach casting.

A beginner should not actually start with 30 ft of line but work their way up to 30 feet. Start with about 10-15 feet and then extend line as your loop formation improves.