Hi and welcome to DnM, Jaqueline07. you can Use the search button at the top, enter the info in of the person(s) you are looking for, then click search. You can then read the profiles of those people and send private messages (PM's) to those you think you may get along with.
you can also ask and answer poll questions, rate, comment on, and upload pictures, videos. Post messages on people's "walls", send gifts, and probably a lot more stuff I can't think of right now.