It depends on the kind of extensions you want to try. Clip- ons and Tape Extensions take lesser time as compared to the ones that are strung together with the help of glue.
The wigs made up of real human hair have no side effects at all as they are made after proper processing. Moreover, special instructions are given by the stores to take proper care of them. The wigs should not come in contact with water and harmful chemicals. If stored at proper places, these wigs can be reused for a long duration of time.
The toupees need to be maintained properly so that they can last long. They need to be kept at proper place and it is also required that they are washed at regular intervals.
Although there is no harm in coloring the wig, but if it happens way too frequently, then it is not good for the wig. The wigs may lose their luster if colored too often.
The clip on extensions save time and are also easier to wear as compared to the tape extensions. The clip on extensions also last longer than the tape extensions as they can be easily removed.
In order to attend the training sessions, you will need to visit the store or saloons as the necessary equipments are available there only. Also for the practical learning, you will need to see some cases of wigs or hair extensions yourself.