The main rule with drifting is throttle control it does take a while to get nailed,u could try locking the front but just use putty or something u can take back easy,everyones drifting is different same as car setups,so its hard to explain the best way lol
the way i do it is like this as the back end creeps round i increase the throttle and keep the angle while adjusting the front wheel angle.
that might not make much sense reading but it works for me,like i said throttle control is key here,learn to slowly sweep the speed instead of quick boosts of speed i use sticks and i find alot easier than a pistol but then again everyone drives different.
And pratice makes perfect m8 it took hours and hours trying to nail a perfect sweeping drift like the ones you see on the vids,keep at it cos pratice makes perfect as they say