It is a good idea to start by assessing your existing level and then sit down with your teacher and work out what objectives you might achieve. A lot depends on how you want to approach your language learning and the amount of time you have to invest. Remember that nothing succeeds like success so make sure that your objectives are realistic and achievable.
How do you assess your proficiency? The Common European Framework of Reference for Languages provides descriptions for different levels of competence: A1, A2, B1, B2, C1, C2.
Let me know what you think your level is!
For a description of levels of competence (A1, A2, B1, B2, C1 C2) follow this link.