There is no way that can be answered with your having no information. If you are a woman, the book Our Bodies Our Selves will be very helpful. You can also search the web for help. If you have not figured out where it goes at age 17, you better talk with your mother.

As for positions, there is an excellent resource on the Home page of the site.
http://sexinfo101.com/index.shtml

As for what goes where, I recommend the book Brandye mentioned. You need basic information before ever saying "yes" to your boyfriend.

As for fooling around and kissing and hugging, I recommend that you begin by reading through this Index, first, and then reading each of the articles:

--BEGIN HERE--w/a Partial INDEX of Sex Info 101 Sex Ed. Topics

There are many useful and informative articles in the index. I'd begin reading the book and the articles, then as questions come up, ask. We're here to help yet you have to have some understanding about what the help pertains to, first, and how. I'm also very surprised that you made it to age seventeen and you do not know where a penis goes. You need much more information on your own body, not to mention his.

Am I Ready For Sex?

As important or even more so is that you understand all about contraceptives and their individual benefits, short comings, and quirks. Before saying yes to intercourse, you better be as forceful in requiring boyfriend(s) to use a condom while at the same time you use the pill, or some other highly reliable form of birth control. At the very minimum, use a spermicide.

Birth Control Failure Rates

I hope this is of help. Do your homework, and feel free to post questions along the way.