Entering new territory. My first tarantula.

[YungRasputin]

Yeah that's generally what I've heard, you have to wait for a molt and examine the insides.

in spiderlings (“slings”) and juveniles yes because they’re simply to small to visually discern with any accuracy without using equipment (eg: microscope) however when they’re adults, like what you have, there are physical characteristics that differentiate them that you’ll be able to tell eg: females will have the flap on the abdomen and males will “hook out” i.e. you’ll visually be able to see their “tibial hooks”