I was fortunate to attend a Marissa Oosterlee portrait class during my holiday in Europe. It’s took quite a lot of planning and as it had to fit in with the time we were planning on going. Also she did not have any group classes so I had to book and pay deposit almost a year in advance.
I found a picture of Leighton Meester that had all the elements you might find in a portrait. It had wavy hair, open mouth so you can see the teeth and some jewellery.
This was my try after 3½ days. Still have a list of stuff to finish. Marissa finished hers early on the 3rd day.