My very first job was as a barista serving espresso coffee drinks. 
that sounds like a great job to have, I myself have been interested in becoming one, Any tips I should know? 
Yes just know the different type of behind the counter drinks to serve that is popular like hot drinks,cold alcoholic and non-alcoholic beverages.
Indeed I'll have to learn the ropes and I'll get the hang of it, What is a baristas salary? do they make a lot? 
No it's not no 7 figure job it's a typical bartender like job about minimum wage but tips is how we made our money you may make more working at Starbucks coffee company honestly but it still was very fun. 
Oh yeah I should have figured that tips was the majority of the pay, What age do you have to be to be a barista, I assume its 21 or older? 
Yeah minimum wage it's not the greatest I mean it is lowest remuneration from employers but yes indeed the tips made up for it I had some good nights and yes 21 and older being you handle alcohol at times. 
Ah ok I figured that, Do you have any other useful tips I need to know before getting a job as a barista?
button operation to an involved manual process. Espresso is a notoriously finicky beverage, and good manual espresso making is considered a skilled task. Further, preparation of other beverages, particularly milk-based drinks such as cappuccinos and lattes, but also non-espresso coffee such as drip or press pot, requires additional work and skill for effective frothing, pouring and most often latte art.
The barista usually has been trained to operate the machine and to prepare the coffee based on the guidelines of the roaster or shop owner,
Barista
A barista (; ; from the Italian for "bartender") is a person, usually a coffeehouse employee, who prepares and serves espresso-based coffee drinks.
Etymology and inflection.
The word "barista" comes from Italian, where it means a male or female "bartender" who typically works behind a counter, serving hot drinks (such as espresso), cold alcoholic and non-alcoholic beverages, and snacks. The native plural in English is "baristas", while in Italian the plural