A lot of people have told me that great books class required for the honors program is very stressful. Most people do drop honors their freshman year - they only did it for the housing.
Other than that, if you are in honors, there are no “required” courses for LSA. However, if you already know what you are interested in doing, your advisor at orientation will make some suggestions. Note that your advisor can only help you make suggestions; they cannot oblige you to go with their advice. To be honest, some advisors at this university do not make the best suggestions.
For first semester freshman year, most people go with 14 or 15 credits. Many of the STEM courses here at umich are very demanding and you are not going to want to take only STEM courses in one semester, even if math and science were your thing in high school.