It’s a personal choice depending on how much time your ship is in port. We walked off the ship on a very rainy, windy day & our snorkel excursion was cancelled. We found several small buses there at the dock and booked a 2 hour tour with Ben’s Tours for $20pp including the Curacao Factory (has samples!!) and a beer on the bus.
We have also used Irie Tours doing their 6 hour west beach tours. $65 pp and very good. You see some sites plus get beach and/or snorkel time. They have a big white tent and will take walk ups if enough room. We pre-booked this one before we left as there were 4 of us wanting to do it. They offer different tours so google them and see if one interests you.
The town is very walkable too and it’s nice just strolling around, over the bridge, through the shops, have lunch etc.
I love Curacao! Have fun, hope this helps.