Alex,
There's 2 or 3 effective way of tying the FG. What's important is that you find the one that works for you and practice, practice,practice.
I also tie alternating half hitches both on the leader and the main line but lots of guys don't.
Whatever sytem you use, those wraps have to be pulled up TIGHT so they bite into the leader. As an indicator, I look for the braid to 'plasticize' and go opaque.
Enjoy, great knot.
Regards,
Trev