As you say, the hair you have is quite dense.
65%-70% would probably be right for you.
Your hair is also quite straight so a minimum body wave or straight hair would be a good choice.
I've done a drawing of what is meant by temple flaps.
They bring the side hairline forward and help tie together the overall look, especially for the style you're going for.

Remember to send in a hair colour sample and take it from the front of your head, not the back.