You’re doing great so far:)
If you want to get into Muni, I’d suggest a 24"X3" w/ 150 cranks (anything longer would prob. be too much unless you’re really tall, like 5’10" +). For mild to moderate Muni some prefer a 29" wheel.
Check out the 45+ yr. old thread. There’s also a women’s thread, but I couldn’t find it:o (I bet Cathy knows where it is).