The Colts traded their 2014 first-round Draft pick for the 22-year-old and he played a limited role in their win over the San Francisco 49ers last week.
"There's still going to be a lot of help. Andrew [Luck] and Donald [Brown] will help me out a lot," Richardson told the club's official website.
"We all have been on the same page. I've been learning the game plan every day, sticking my face in that playbook, a few hours after practice, an hour before practice, after meetings.
"I've been studying hard. I feel I'm ready to go for it. When they call my name, I'll be ready to go."
The Colts face the Jacksonville Jaguars in week four.