Still a short sentence hard for me

The sentece should read:

My friend's enthusiasm set me off collecting stamps.

It's a poorly worded sentence, at least to an American's understanding. It might be better expressed as: "My friend's enthusiasm for stamp collecting got me interested, too."

relax here when tired
As you konw,"F.A.M.I.L.Y" can be expland as"father and mother I love you";meanwhile, how can we understand this meanful word"h.o.l.l.a.n.d"
Expect your consummate explannation

I had never heard of family being turned into the acronym to which you refer, and am unimpressed with it. I also have no interest in playing acronym games with you. However, you might someone willing to play in the Trivia and Word Games forum.