Question

I don't know how to write a grabber for my first paragraph

Answer 1

Doing a search of "writing grabber tips" will get you a lot of hits, but most are short on examples.

Here is one of the more helpful web sites I was able to find:
http://home.earthlink.net/~khatzi/essay/intro.htm

Answer 2

Here are some ideas....
Tell a relevant story...but stop right before the climax...and link it into your topic.

Ask an absurd question....that is relevant to the topic. For instance if you are talking about global warming, Ask..."Have you ever seen a seal swimming right outside your door?" or something equally absurd.

Make an imperative statement... STOP! Don't touch that dial! then sync into your topic.