Translation of alkaloid in Spanish

We were indeed the only ones there so we took our time and enjoyed the moment. A little later we ate lunch which consisted of the snacks we had brought and a coconut. It was only one o'clock.
Sammy our cab driver brought us to the hotel, he promised to pick us up a few hours later. We took a shower and rested a little. I could not sleep because I was too excited of being in a new country.
I'm writing you in English because I don't have a lot of time and writing in German will take me a long time. Just a few corrections: you can not say in English How you do, you need to say How do you do...