<p>I think it would be a good idea to enroll in four classes at the beginning. Suppose you wanted to take the first chemistry class of its series and one of the life sciences courses (where the latter is considered to be significantly weeder where the former just depends a bit). It would be wise to take two other easy GEs (general education courses or core requirements) along with this or a combo of a GE and something like English composition 3 or whatever so that you can decide to take the two "weeders" and the easy GE or just go along with the easy GE and writing class and the one "weeder" course. There is no penalty or charge or whatever for dropping a course (in the early stage of the quarter) or for having 4 courses. This makes shopping for courses slightly easier after getting an idea of how difficult it would be to manage courses... or heck keep all 4 if you feel like you can do it. Sure, you might invest more work at the beginning of the quarter but it might be worth it if there is any uncertainty.</p>