Hello 17 and unsure,
Good for you for first asking for advice and for placing a high value on human life.
Physical pleasure can be fulfilling because we are created to enjoy sex. Intimacy, companionship, and family are also wonderful aspects of sex.
Unwanted pregnancy, sexually transmitted disease, parenting, and the emotional stress and pain that can come with relationships and break ups, however, are very real and possible as well, like you were mentioning.
Be careful about what you let influence you right now while you are so young. What seems really appealing today can change your life in a way you can not foresee.
Advice that helped and protected me when I was your age (and is still helping me now as an adult) can be found in this information made specifically for young people entitled "Young People Ask, Answers That Work".
https://www.jw.org/en/bible-teachings/teenagers/young-people-ask-volume-1/
I hope it helps you as it has me. And again, good for you for reaching out and asking advice!