This evening my neighbor came over and gave me a quick tutorial on my bike.
First, he taught me how to take on and off the front tire. I think I get it now. I can take off and put on the front tire if I need to.
Then he taught me how the shifting works. The left shift has three gears and the right shift has seven gears. 21 total gears. But now I could actually get up a hill.
Lastly he taught me how to put on my lock. A U-lock and a chain. Gotta lock up the bike and wheel. So complicated!
I feel much better now. More prepared.