new to sex , a few questions

I'm 19 and lost my virginity to a 21 year old who is a lot more experienced. Anyways yesterday he wanted to have a quickie before I left his place because I was drained and had work the next morning. Our quickie with like 15-20. Which I found extremely long before he got off. Our regular sexs is pretty long also he doesn't get off super quick. Is that good or bad ? Our sex is starting to get better now that it doesn't hurt anymore. 
Also, what's some things I can do to spice up the sex. Mostly he is the one doing all the work. Lately though I've been feeling more adventurous and stuff.