Yes, finding friends can be hard. But finding friends doesn't really depend on your interests, it rather depends if you're ready to initiate a conversation with someone or propagate the conversation. There's something i would like to clear for you, most women feel that another person needs to start a conversation with them and they themselves just wait for this to happen.(General Opinion). There's nothing wrong if a lady initiates the conversation, and most people feel glad when this happens (in a positive way).
I would suggest that you do the following, these personal tips shall help you too.
1) Hang around regions where most people are active and not AFK; This ensures that you don't feel ignored.
2) Show good interest when someone texts you; This motivates them to keep talking to you.
3) Initiate conversations with random people; On SL you have nothing to lose, a bad conversation is forgotten easily. Move on, find a new person, start a new conversation.
4) Conversations are like a car starting, they buffer in the beginning and run smoothly later. Don't be lose hope in the initial parts of the conversation, things will be better later.