2 Really Dumb Questions

1. Is there a way to get out of RTTS when you’re playing and back to the game’s main menu? I find myself having to dashboard just to stop playing RTTS.

2. Is there a way to reset your entire RTTS and start from scratch again?

1. There is a way to go to the main menu. I believe it's either hitting circle when in the locker room menu, but I could be wrong, but I do know you can back out of it.
2. As far as starting over, do you mean with the same player you made? If so, what I do is make two saves right before the first Showcase game, and use one of those saves as I progress, always leaving the second one right there at the first Showcase. I do this because the game likes to overwrite your most currently used save file, so once you get drafted it saves, so having the second file is very important.

If you mean with a brand new player, then when you go to start the mode, there is a continue option, or new option.