It is not legal to seek advice for games that are on-going.
But assuming you know that and that this game is now finished, I would say that O-O woiuld be a good move for black. I cannot think of a better one. There is nothing to worry about - the position is ok for black.
Hi!
So this is my first game on this site, I'm only a beginner chess player but I'm enjoying playing. I'm playing against a friend of mine and I was really unsure on my next on the following board;
Any advice appreciated.