So, you don't have no legitimate reason to come to Mexico, just want to have fun with your friends.
Are you aware that your stay in Mexico will be far from a 5-star resort all inclusive vacation? Most people think that life in Mexico resembles their 2 weeks long stay at an upscale resort with accommodation, food and all drinks included. And then they face the harsh reality of it all.
Again, what do you know/are able to do/have qualifications, certificates, credentials beyond your knowledge of English?
Languages won't take you that far in Mexico, you absolutely have to be able to perform several important tasks.
And you ain't gonna make that much money on guiding...
I ain't trying to stop you from going, I simply want to give you heads up on what to expect in Mexico.
Oh, and what do you know about getting a Mexican visa/work permit? ;)