The 20-year-old, whose father Andrew played 207 games for the Cats between 1982 and 1993 and captained the club, has been rewarded for a number of consistent performances in the VFL.
Speaking before Geelong's squad flew to Perth on Thursday afternoon, Bews said he was preparing for a torrid first game.
"It will certainly be tough," he said. "The trip alone is tough enough.
"I don't want to change too much from what I've been doing in the VFL, which is just to lock down my direct opponent and try and attack from there.
"It will be awesome playing with Mackie, Boris (Enright) and all those boys down there. It will be awesome fun."
A 184cm defender who has great pace, Bews was recruited by Geelong in the 2011 NAB AFL Draft.
He made two appearances during the 2012 NAB Cup, then spent the rest of the season in the VFL.
Bews was part of the team that defeated Port Melbourne in that year's VFL Grand Final. It was the first flag he'd won at any level of footy.
The youngster's career hit a snag early last year when he was sidelined for a number of weeks by a hot spot in his foot. He then suffered an ankle injury when he returned.
The fitness dramas robbed Bews of the chance to debut earlier than now.
He was fit and firing by the end of last season, and was part of the Geelong team that lost the VFL Grand Final to the Box Hill Hawks.
Bews is the Cats' first AFL debutant this season.
He is setting himself for the big task of quelling Fremantle's Hayden Ballantyne, although the small forward remains in doubt after having jaw surgery this week.
"I know he can be a pest, but he's a good player and he needs to be shut down," Bews said. "So that's a possible match-up."
Bews will get plenty of support from Jared Rivers, who has been one of Geelong's most consistent backmen this season.
Rivers is preparing for a tough night against the Dockers.
"There's no doubt they've got some dangerous forwards up there," he said.
"Pav's big 300th, so they're going to be really up and about for it.
"So it's a big challenge, but we're looking forward to it."
Another player preparing for a sizeable mission is ruckman Dawson Simpson, who will take on Dockers giant Aaron Sandilands, just like he did in his debut game.
"I was a late inclusion for Otto (Brad Ottens) and I didn't really know what was happening," Simpson recalled.
"I was just trying to take it all in, let alone take on the big fella.
"This time I'm a bit more prepared, couple of years older, and have got to know the game a bit better.
"I'm really looking forward to it, actually."
Twitter: @AFL_AdamMcNicol
