The more important are as follows:
The size of the class. Many training organizations have large class numbers. My class size is a maximum of four. I am unable to take in everyone who wants to train with me for this reason. However, rest assured that this is the best way to train because the nail technician course is highly practical.
The experience of the instructors. What qualifications do the instructors have? Learning to be a nail technician is a highly practical skill. You will not learn it from a whiteboard or by reading a book. My sure your instructors are highly experienced.
What products will you be trained with? Will you be trained with inferior products which will lead to poor performance and ongoing problems.. or will you train with internationally recognized quality products.
Will you be issued with a certificate when you complete your course. In reality, this is not as impotant as you may think it to be.
Does the nail technician school provide support? Upon completion of your course, you will need assistance and guidance. Many schools leave you on your own after you finish your training. This is one of the most important requirements.