Paralegals are legal professionals who assist attorneys with legal work. Although they work with their attorneys and often do much of the legal work, they work under the direct supervision of the attorney. Paralegals do not practice law.
Paralegal courses are designed to help individuals develop the basic legal knowledge and research skills they need to work as legal professionals. Many obtain basic legal knowledge while working as legal secretaries and legal assistants (these are two separate jobs in a law firm).
A paralegal is not licensed to practice law though they work under the direct supervision of their attorneys. Paralegal courses teach students the legal knowledge and research skills that they need to work as a professional paralegal. These courses are taught in-person, online through organizations like the National Association of Legal Assistants (NALA), and via online college courses. Most online courses offer certifications and advanced degrees once you complete the basic course.