hi , i've been a nail tech for 3 yrs now , i mainly do a lot of fibre glass, silk wraps, acry-gel, and gel nails,i've not done acrylics for over a year and dont really have the custom for sculpture, i have just recently sold my tanning and beauty salon and im intrested in going on my teacher training course ,do i have to get my intermediate and advanced cirtificate 1st ? and do i have to be good at all types of nails, ps.can any 1 recomend a good sculpture product that is quite easy to use but lasting...