The quests Linden Realms are very time consuming and as you mentioned don't give enough.
I want to learn how to play the game before I put my money in it.
Jobs. I am looking for one but they are very hard to find.
Contests. Your chance of winning is slim.
Any other ways?
I recently started play SL, and I'm really curious about the game. I've noticed how a lot of things costed money which I didn't have. What's the best way for my situation to earn money?