There's absolutely no way to tell how fast a horse will be when you just walk/trot the pattern. (BTW, I'm glad you were only walking/trotting because it is downright dangerous to lope a barrel pattern on grass. You're just asking a horse to slip around the barrel.)
Paso Fino's aren't exactly barrel horses. But if you enjoy, and she enjoys it, go for it.
But at this point in the game, it's just impossible to tell.
And you actually hugged all three barrels too tight, and turned too soon on all of them, and your horse had zero bend in her body. It'll take some work.
∞•*˚ Βгįťţαňγ ˚*•∞
It is not enough to know how to ride; one must know how to fall.