What to expect from a prop trading job?

I've received and accepted an offer to start as a trader at a prop shop and while I have a decent understanding of my day to day job, I'm realizing I have a lot of unanswered questions about career path. I'm hoping you all can give me some insight.

I don't want to name the specific place I'm starting at but think Chicago prop shops. I know this makes answering some of the questions hard but I'd prefer not to make my cluelessness super obvious to my future coworkers.

1). How is retention among juniors at prop trading places? Are there any places known for having particularly high churn?

2). What percent of people who receive a full time offer end up being awful at it?

3). What do exit opportunities look like for traders at prop shops?

4). What is a typical career path for junior traders?

I appreciate any info you all can share.