How hard is transferring?

My personal experience with CC advisers over the years has been mixed. Some are really outstanding and others aren’t. Don’t rely on them to do the thinking for you. Figuring out pre-reqs and course sequencing can be a challenge. Use the TAG planning tools, visit a counselor at your target UC, talk to your peers, take advantage of tools like rate my professor to balance your workload semester to semester.
Lots of students struggle with this transition but, it is doable. Just look at your CC’s 2 year transfer rate (most are below 30% - which there are a multitude of reasons for but, that is another discussion).
Good luck.