I have been skiing for many many many years, my advice do not bother with lessons in the UK.
I do not know what country you are going to but the biggest problem with ski school is the English (language, not people). & the size of class.
The plus side of ski is you meet like minded people. I took my partner 2 years ago she couldnt get on with it, (poor beginnes slope). I have talked her into going again (6 March), as I have been to this resort & hotel many times I know she will pick it up this time, I have also promised her that we will go skiing xmas.
BYTW when she went skiing before she was great at the apree time.
For info, I stay up the mountain in Saux, yes you are stuck up there all night, if you do go to town you do need to arrange for a skiddoo to pick you up (thats fun).
Anyway I am sure you will enjoy yourself, have fun.