Hi Marcus.
"for here" is "koko de nomimasu" or "tennai de nomimasu"。
koko means here, tennai means in the shop.
nomimasu means I drink.
"to go" is "mochikaerimasu"
cappuccino o onegaishimasu.
short size.
tennnaide nomimasu.
if you eat something with a drink, you can also say,"tennai de tabemasu".
"tabemasu" means I eat.
I hope my answer helps you.