A PhD is super fun and super hard. But it is key to be realistic about the outcomes. It is a life changing experience, but definitely have a plan for the end of it. There are so few academic tenure jobs and so it pays to do a bit of research on what you want at the end off it beyond just academic life. If you can do that the experiences are amazing, learning to think and work at the higher level and learning to compromise and work through others work is utterly refreshing. It is definitely a space to let yourself really explore thinking and researching.