Welcome Rob. I'm 69 and on my ... er ... uh ... hmm ... seems I've lost track of how many bikes I've had since I started back at it in 1999.
The Schwinn is just the start. You'll be on a $2000+ road bike in no time and those hills will be just a bump in the road.
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The Lord is merciful and gracious, slow to anger and abounding in steadfast love. - Psalm 103:8
I am a cyclist. I am not the fastest or the fittest. But I will get to where I'm going with a smile on my face.