Thanks everyone for your replies. And that was great info about the #57 bus. I might just take it sometime.
I ended up calling Lyft to take me to Hanauma Bay, Magic Island, and other places. And I used The Bus for short rides. And my car finally arrived last week, so I'm getting around much easier now. I've become acquainted with the traffic situation, so I may still use The Bus and/or Lyft, depending on where I need to go.
I loved using Lyft. Super convenient, fast, and very very reasonable prices (I used Uber once and it was more expensive). If anyone is interested in Lyft, let me know so that I can refer you and we both get free rides.
Loving this city! So glad I came.