For a normal well balanced person, being in prison isn’t fun.
You lose control of your life, you can make very few decisions and anything you need or want is in the control of someone else.
Your horizons tend to become very limited, small insignificant things take on importance that is disproportionate, such as maybe not having your washing dry on time, or perhaps the gym hours were cut one morning.
You are usually incarcerated alongside the rejects of society, people who often believe the most idiotic conspiracy stories, people who refuse to hold themselves responsible for anything, and people who have incredibly low levels of education - you would find it difficult to find another prisoner with whom you can hold a sensible conversation.
If you like trivia tv, like Kyle, X-Factor and other utter populist trailer trash rubbish then you’ll be fine.
Even if you decide to achieve something, such as learn a trade, you may well find it is very difficult to find a course that can attain a reasonable ability, the overwhelming majority of education and training is geared to the terminally stupid, there is often very little for anyone with a halfway reasonable level of education, prisons are set up for the types of clients they get.
Your life is on hold, all you are doing for the most part, no matter which type of prison, is getting older, stuff happens outside that fence and you can’t do a damn thing about it.
If you are lucky and well behaved there is a chance you can get to a low security prison where you can get genuine employment with genuine pay, however these places are not at all easy to come by.
For any person of reasonable education and social adjustment, you may well come out and find you are actually more stupid than when you went in, because the company you get in prison seems to suck out all your critical faculties.
Yes there are always exceptions, there are intelligent prisoners etc, however you will find these are vastly outnumbered by the majority, sometimes I wonder how they can remember how to lift a spoon to their mouths to feed.
The vast majority are repeat offenders, they know the system inside out, they complain about how crap it is in prison, but they still keep returning, and the reason that most of them were caught is sloppiness, stupidity and greed.
In UK prisons you can usually get along without much hassle from others, the environment is less agressive than the media would have you belive, even in the higher security rated prisons, keep away from drugs, tobacco, mobile phones and hooch and you won’t get into debt - and this will reduce your chances of having problems with prisoners and staff dramatically.