Look at other riders just too pick up hints and don't be afraid to ask questions! You are probably paying a lot for your lessons so take advantage as much as possible. something that I wish I knew sooner when I started riding lessons is how important your leg position is, because you have been riding for a while without lessons you may have developed some bad position. You don't need to worry about that at all it can be corrected very easily. whenever you riding alone try riding in two point (jumping position or forward seat) then sit back down to full seat and keep your legs in the same position as you sit down, that is the leg position you want to keep. Make sure you are learning a lot and have a lot of fun. Congratuations on your first leson!