I'm new here but where do I click to answer someone's question?

Hi! Welcome to Fluther!

If you’ve joined, when you click on a question, a text box will open up in which you can type your answer to a question.

Under each question, and under all of the answers to the question, there is a box with a title above it, “Answer this question”. There can be a lot of answers on the question so read your fill of answers and find the box under them all.

Yeah, you have to go all the way to the bottom/end of the thread like @dabbler said.

Welcome to Fluther!