focus on finishing your major prep classes, this is really important.
your first year at CC you want to try to get your GE classes out of the way (i learned this the hard way)
try not to fall behind on classes, failing a class will hurt you, you could always retake it but you would be wasting time, i mean if your paying for your classes, might as well try your best.
if u want to transfer in 2 years, take at least 15 units per semester (summer classes help as well)
take advantage of your resources (counselors, stem center, library, tutors, OFFICE HOURS)
i am currently attending a CC, going into my 3rd year, stem major so its taking a while to finish major prep classes, will be applying this year for transfer
please ask if u have any more questions.