There are many things to do and place to go in Second Life.Use your imagination and you can do ANYTHING (almost) in SL. You can be adventurous and do roleplay ..lots of free items on marketplace and you can dance, sing make money, work, marry have friends and parties , raise exotic pets and sell them, have babies and families explore your sexuality if that is something you are interested in (and a lot of people do that ) you can shop until you drop, dance the night away at any kind of venue you desire...ride dragons, soar through the air flying, work on your photogrpahy skills, build things and learn how to texture and script etc etc. Some things cost a lot of Linden and some cost nothing.
I would suggest to meet people go to your search and click on places...find something that sounds interesting and has a lot of people. There are many people that will help you along the way. Listen to advice people give you...and don't believe everything people tell you.
I have a lot of places I would suggest going but not sure if its allowed in here. . Most of all...Enjoy SL...it is an amazing place