Electrical Engineer and Mechanical Engineer are most popular/common.
About 630,000 jobs for 280 million working adults. About half of them, are for each job role
This is a pretty good video as well.
Engineering fields are converging, meaning that; If you can be any type of engineer, its probably not going to be too difficult for you to switch job roles. At least from a skill set and knowledge comprehension standpoint.
Other types of engineers are Systems Engineers, Software Engineers, Chemical Engineers, Industrial Engineers, Civil Engineers, Nautical Engineers, and Aerospace Engineers.
Mechanical Electronics = Mechatronics Engineer
Electrical Technician = Electrician
The Engineering Fundamentals Exam (1st Amendment) is being talked about as required to become a technician (systems, software, electrical, chemical, industrial, civil, nautical, aerospace).
https://ncees.org/exams/fe-exam/
The Engineering Professional Exam (consistency) is being talked about as a requirement for contracting and maintaining professional liability and obtaining good standing within the engineering profession/industry/field.
https://ncees.org/exams/pe-exam/
The Handbook for starters. Not too hard. Mostly 100 to 200 level undergrad science and math.
Check the table of contents.
https://www.cee.msstate.edu/wp-content/uploads/fe-handbook-10-0-1.pdf
https://ncees.org/ncees-publishes-new-version-of-fe-reference-handbook/
Nobody wants to do never ending education and training or retaking the same exam with a few extra questions every 3 years.
https://ncees.org/licensure/
It's a job that's available for people that are into it.