Please help me maximize my transfer admissions chances!

I am considering attending community college then transferring to a four year for mechanical engineering. My top choice is Cal Poly SLO. I am in state. What should I do during community college in order to have the best chance of being admitted to CPSLO for ME? Is there an admission guarantee (such as TAG for the UC’s) for CPSLO? What is a target GPA I should have and number of EC hours? Thanks!