It was pretty awful. I was born in. My father was the presiding overseer until I started high school. We moved to a new congregation then and he was seen as a threat by our new presiding overseer.
Up until high school I had no Witness friends in school or even in my neighborhood. I had neighborhood friends who shared the same interests I had. Both my neighborhood friends and my interests were frowned on by my parents.
Until I moved and started high school I was ridiculed constantly by classmates for being a Witness. I never felt proud to be ridiculed for my imaginary friend. I hated it. I often tried to hide the fact I was a Witness.
Every Saturday morning I had to get up early to go out in field service. Unless I was sick, I couldn't stay home and watch Saturday morning cartoons. Sundays were no better. If we had the morning meeting I had to go out in service after the meeting and starve until dinner. If we had afternoon meetings I had to get up early on Sundays to go out in service. That means I couldn't stay up late on Friday or Saturday to watch my TV shows. My parents didn't want me falling asleep during the Watchtower Study.
That which was hardest was that I am a huge sci-fi/fantasy enthusiast, So much of what I was into was deemed "demonic" by my parents and forbidden. Do you have any idea how difficult it is to stash a $2,000.00 comic book collection as a 12 year old?