If you get wet might as well go swimming. Take things as they come.

Could be: Make yourself at home!?

我不是高手，也不算是譯者，但是－ 這句子很『since that's the way it is, we might as well accept it』差不多。 （更正式： "one might as well accept it" - https://en.wikipedia.org/wiki/One_(pronoun) ） 要看語言背景才能給你更地道的！

it's not bad! 'you' and 'here' can change, depending on the situation, obviously..

since you are here, you should get used to it ? 好粗陋.我只能想到这个了。