If you want to transfer to SLO, your best bet is going to a community college for probably at least 2 years (you need to finish all required GE’s and major prep) and then try to transfer. SLO is a very tough admit for transfer students so there is no guarantee. Do you have much AP credit which would help reduce the # of classes you would need to take? CC to CSU transfers get priority over CSU to CSU.
What major are you interested in pursuing?