Translation of einmischen

Boston is kind of huge neighborhood, generally very friendly people and you may meet many people that you already know. So it is pretty easy to get used to and if you grow up there, you don't wanna leave. If you do, you are going to miss it terribly.
In the attachment you will find the reviewed documents. Your Portuguese is quite good. I understood everything. If you write the same text in German, I can know what you wanted to say.
Why did you sit on the box? You obviously did not know that there were presents inside. Now, seriously, do you have a backup plan? We must buy new gifts if we want to go to the party.?