Hi there, I am going to train with Oakley Academy for hair extensions but I am quite confused of all the different kinds i.e. Micro beads nano rings tape in fusion beaded wefts etc. I am just wondering which are the most popular and which ones I should definitely do. I am a bit wary of doing too many as I feel it would be better to totally master a couple rather than not be great at loads if that makes sense. Thanks in advance