How hard is it to register for an HCC course?

Thinking about taking a class or two at HCC this summer/fall to knock out some credits. I’ve never taken courses there before and I’m wondering what the registration process is like.

Do I need to go through full admissions first, or can I just register as a transient student? How long does the whole process usually take? And do classes fill up fast?

If anyone’s done this recently, I’d really appreciate some insight. Trying to plan around work and another school’s schedule. Thanks!