Remember that the easy gears on the rear are the big cogs with more teeth. And the smaller ring with the fewest teeth in the front is also an easier gear.

If you are having trouble going up a hill and you have easier gears remaining to use, then use them. I see way to many people struggling to get up a hill and they still have lower ratio gears available to them on the rear.

But just beginning to cycle you should probably wait and ride more. Save your pennies while doing so and maybe you can increase your bike budget.