Ready for fish - what to get?

If it is a new tank do not add more than 3 or 4 fish until the tank is stable. A good sign it is stable is algae starting to grow. I would stay away from the tetras with a new tank as they are very sensative fish. The rasboras will do well. Start by purchasing 3 or 4 since they are a community fish and will school well in your tank.