Put simply, it depends on what you want to major in. Admission criteria generally includes GPA, completion of prerequisite classes for one’s major, and completion of general education (with some exceptions, naturally - they say that GE is not an admissions requirement, but it’s in your best interests to have it completed anyway). The Personal Statement, Extracurriculars, etc. are considered, but to a lesser degree. Being accepted as a transfer student is more about numbers and completion of necessary classes than freshman admission is.
For Humanities/Social Sciences, it’s generally not too difficult, with perhaps Business & Economics being the exception. Certain other Social Sciences can be impacted (i.e. Psychology), making admission more difficult, but certainly not impossible. Humanities majors are generally not impacted. Most Humanities/SS people complete IGETC to satisfy their GE requirements. ( http://admission.universityofcalifornia.edu/transfer/general-education-igetc/igetc/ )
STEM (acronym for science, technology, engineering, and math) majors often have to complete more classes for their major than people in the Humanities/SS, and as a result, follow a 7 course breadth pattern instead, which can vary between schools one is applying to.
Look at this chart - it shows the average admitted GPA for admitted transfers, admit rate, etc.: https://www.admissions.ucla.edu/prospect/adm_tr/Tr_Prof14.htm
The College of Letters and Sciences is a massive college within UCLA that offers tons of majors. Look through that website, and you’ll get a better idea of what sort of GPA you would need.
assist.org can show you articulation agreements between your CC and UCLA.
Which CC do you plan to attend? What disciplines are you interested in? (i.e. are you more into STEM or the Humanities/Social Sciences, or something else, like Nursing?)
With hard work, and careful planning, it’s really not all too difficult - but you need to be willing to put in a lot of effort to keep a high GPA.