The only requirement is faith in Jesus (more on that here). That means believing he died for your sins and rose again and confessing him as Lord.
A lot of us end up treating a free gift like a paycheck we have to earn.
Think about the thief on the cross. He couldn’t do anything except turn to Jesus, and he still heard “today you’ll be with me in paradise.”
Repentance and prayer grow out of being saved, not out of trying to earn it. The work was finished on the cross. What matters is trusting the one who did it.