recently bought an older Quintana Roo road/tri bike. even though I ride almost every day I still have a long way to go in understanding the in's and out's on this bike.
couple of questions about gearing. the area I am riding has some substantial hills and I want to ride NW Arkansas that has some real hills so I am contemplating making the following changes and would like your input

switching from a 39/53 crankset to a 34/50 compact crankset pros/cons?

current cassette is a 11/23 thinking about a 11/30 or 11/27 which one would be best pros/cons?

BTW this is a 9 speed

Thanks