Calypso is really pretty, what a great find! Also- welcome to the forum! 
You’ll find all sorts of stuff to learn and chat about on here. 
(Also I agree with female.)
edit: Forgot to add that you’re right, females do have sort of an itty-bitty bulge and teeny-weeny pores that make it kinda tough to tell if you don’t have a known male and female around for comparison. It’s definitely not just you, I get confused too! If you scroll down a bit on this post, you can see pics of the vents of a mature male and female for comparison: