Six months in county is manageable if you go in with the right mindset and a clear plan for how you are going to spend your time.
When you show up to self-surrender, the intake process involves booking, a medical screening, property inventory, and being assigned to a housing unit. It is not a fast process and the first few hours are a lot of waiting. Stay calm, be cooperative with staff throughout, and do not make the mistake of coming in with an attitude. First impressions inside matter more than people expect.
Once you are settled into your unit, the reality of county jail sets in quickly. The food is not good. The programming is limited compared to state or federal prison. The recreational options are minimal. Boredom is genuinely your biggest enemy over 180 days, and how you handle that boredom determines what kind of time you do.
The population in county jail on shorter sentences is generally not looking for trouble. Most people want to get through their time quietly and go home. Match that energy. Be polite, keep to yourself, mind your own business, and do not insert yourself into situations that have nothing to do with you. Avoid drawing any attention at all.
Have someone send you reading material regularly. Books, magazines through InmateAid, anything that gives your mind somewhere productive to go. Inmates who stay mentally engaged do significantly easier time than those who sit with nothing to fill the hours.
Keep your record completely clean. County jails sometimes release inmates early when overcrowding becomes an issue, and those releases go to people with zero incident reports. Protecting that possibility is worth every bit of self-discipline it requires.
180 days is not forever. Go in smart and come out clean.