Don't despair and don't be frustrated! I think you have to first ride for the love of it. Think about what a small percentage of the population is out there riding a bike and you are doing it!
If you drive yourself to where it's too much like work, you may be tempted to give it up...so first love it and be proud of yourself. Then take the time to become stronger and to work on your form and technique with the tips and tricks that you are reading about.
You are doing great and someday you will eat those hills for breakfast.
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"I never made "Who's Who"- but sure as hell I made "What's That??..."