Take it very easy on the initial flatter part, so that you have some legs and lungs left when the grade increases.
Spin/low gear, mash/medium gear, stand/high gear - that's for you to experiment, find what suits you personally.
Eventually that hill will be too easy. Then you will find yourself doing hill repeats, going faster, choosing smaller cogs. You will also find that your pedaling is smooth and almost casual, your bike and body still and quiet. You'll look like you're casually loafing at 15 mph on a flat road.
Then one day you will see a cyclist ahead of you, and he will be riding in reverse as you sweep him up and spit him out.
You'll smile, remembering back to when this hill seemed so fearsome.