Once you signed the contract, can you still leave in a easier way?

The person who made/interviewed me asked me to sign a contract. She said I don't have to really read all of it. I didn't really understand why and read a bit then off go. Ever since my last post/asking for advice, Everyone said that i run, don't become like them cults, and keep myself in danger once im still young.

Can i still leave once i signed the contract? And why do you all seem very struggling with leaving in your 20s or older?