Good question, Emmanuel. Generally, EMTs are required to have a high school diploma or GED and to be certified by the National Registry of Emergency Medical Technicians (NRMET) - through passing the NRMET -EMT examination. This exam expires every two years, so re-examination every other year is required to continue to be a certified EMT for longer than 2 years. EMTs are a growing industry of jobs, along with other medical hands on professions, that provide the world with critical life-saving and rehabilitation techniques that are important for maintaining a happy, healthy society.
There are many schools around the country that specialize in EMT training, and generally basic EMTs can complete these programs in a few weeks to a couple months, depending on how accelerated you take the classes. You can look for accredited schools around you that have the seal of approval from the Commission on Accreditation of Allied Health Education Programs by clicking the link below.
The classes are designed to teach the fundamentals of emergency patient care, including gaining experience with the medical devices inside the Ambulance, pre-hospital care for life-threatening injuries, and safe transporting of patients. You should also be comfortable (or at least able) to lift and transport 100 pounds or more, and be up to date with all immunizations before enrolling in these programs, since you will probably be exposed to a variety of illnesses working as an EMT.
NREMT certifies medical professionals at three levels, EMT (or EMT-B), Advanced EMT (AEMT, or EMT-1), and Paramedic. EMT is the first level, and EMT experience is required to become a Paramedic. Training prior to gaining certification can be expensive depending on the location, but is definitely achievable compared to the average price of a 4 year college degree plan, and you will probably have more time to work while training as an EMT. After completing an accredited EMT program, you can take the NRMET EMT exam, and passing that you are now a certified EMT.
If you are interested, then I would recommend taking a minute looking at the official NRMET website, where they state the process of taking the certification exam, which also gives insight to what you will be learning through the training program.
Here's another reference page that I referenced answering the question
Steven recommends the following next steps:
EMTs provide basic medical care to patients in the field, including stopping external bleeding, applying neck braces, and administering CPR.
Many EMTs work for ambulance services, hospitals, and fire and police departments.
EMTs must complete 120 to 150 hours of training to obtain certification.
EMTs take the National Registry of Emergency Medical Technicians (NREMT) exam.
Most EMT training programs do not award a degree.
EMT training includes the latest science-based information and techniques, and is led by knowledgeable instructors who understand what it's like to work in the field, and can help you and/or your teams work through problems or situations you might find uncomfortable or otherwise tricky. In addition, we understand that not everyone learns in the same way, so our instructors are adept at explaining concepts in a variety of ways. And for those who either don't have the time to attend an in-person-only class, or learn better in an online environment.