Walcott has joined the Saints on loan from Everton, returning to the club where he got his start in the game.
Despite being 31 and with a wealth of experience, Walcott says he is willing to learn and add new elements to his game.
He told the club's website: "I have managed to speak to the manager.
"The way they press in packs and do a lot of things off the ball – I feel that's going to fit into my style pretty well.
"It will take time to get into it for a few training sessions but, like I said, I'm a willing learner. I learn quite quickly. That will help the manager, I'm sure.
"I've been in the game for a long time, so I know how to adapt pretty quickly.
"I just feel like I want to do as best as I can for this football club and then we will see what's going to happen. Simple as that, that's all I can do.
"I believe in my strengths and the support that the fans will bring to me.
"There's a lot to come."