I agree with Marq. I'll also throw 'communication' into that. I wouldn't be too ashamed of asking. Hence the "Was it good for you?" If she's your fiance, and you both trust each other, her answer shouldn't lead you astray.
Considering she's more experienced than you are, I would suggest actually talking about sex sometime, see her opinions and views, ask her what she likes. Talking about it can be erotically pleasing as well, and lead into some great sex.
Always be willing to learn, that's the key. Keep your mind open around people that are more experienced, and never be afraid to ask questions.
just my $.02