First of all, you should get as much information about genealogy as possible which will help you in understanding the many essential things which a genealogist is supposed to know.
You should attend different conferences and seminars about genealogy in your area which will assist you in improving your research skills and will enable you to search a family history in the most effective and authentic way.
The genealogy conferences are usually organised by the Association of Professional Genealogists and Federation of Genealogical Societies. You should stay updated with the schedule or conferences and seminars and try your level best to attend these valuable seminars and conferences.
You should also read the genealogical publications in order to develop a greater level of understanding about genealogy. It will help you to become a better genealogist by improving your skills in research field.
For becoming a certified genealogist, you need to acquire a formal certification in the similar domain like Certified Genealogist (CG) and Accredited Genealogist (AG).
You should search for the institutes that offer degree in genealogy. By obtaining a formal degree in genealogy, you will be able to find job as a professional genealogist.
Research plays a very important role in genealogy and for becoming a competent genealogist you need to be expert in research. Develop your research skills which will help you to enhance your skills as a professional genealogist.
Along with having research skills, you should also develop communication skills as well which will help you to get information from people while talking to them directly.
You should also try to join different professional genealogical societies which will help you to meet different professional people in the meetings of these societies and you will learn many skills as a professional genealogist.