A professional course is a course that enables a person to work in a particular occupation. For example, a person who completes law school may practice as a lawyer. If you study Chartered Accountancy, you can work as a Chartered Accountant. Both are professional courses. There are a lot of areas like that. Be aware that apart from finding your own job, you can get regular / temporary jobs in government / private sector through a professional course qualification.
A good professional course cannot be defined. An area can only be classified as good or bad, in relation to a person. If a person chooses to excel in that area, that area will be better for that person. Or worse. So all areas are good. The basis of this is a person’s taste in the area he intends to work for.
For those interested in becoming a lawyer, that professional course is ideal.
For those interested in becoming a Chartered Accountant, a professional course called Chartered Accountancy is a must. A person who excels in the legal field may not succeed in the field of Chartered Accountancy. The opposite applies. Then, you have to find a professional course based on taste. And be interested in it. Considering both of these are the areas to look for, that would be the best area for a person. What is good for one person does not necessarily mean good for another.
Some of the other professional programs that humanities learners can think of are: Cost Accountancy, Company Secretary Program, Design, Fashion Design, Film Studies, Fine Arts, and Performing Arts.
Try to take the course according to taste.