In my opinion, the younger the age, the greater the ease of change and consequently the counseling.
As we grow older, we accumulate many experiences, life stories and knowledge. For this reason, change becomes tougher, more difficult, but it is not impossible.
On the other hand, when we are younger (as in the case of children and adolescents), we are more vulnerable to change, because we do not have so much knowledge yet and experience of life. In this way, this public tends to accept advice and change more easily.
In any case, counseling the senior public is also a very interesting and innovative activity, since many adults have shown a greater willingness and motivation to test new activities in life, such as learning a new language, planning a trip abroad, making a New college, and even pursue new professional challenges.
That is all. Reflect on the tips and good luck!