"I really want him to enjoy himself and to get a feel for it and the players around him will hopefully allow him, or create space for him, to use his weapon – speed.
"It's a huge occasion and despite his background and the work he's done, it's still a massive step so there's absolutely no pressure on him."
Williams played schoolboy rugby and rugby league in Brisbane and attended academy training sessions with NRL club North Queensland in 2014.
"I'm really excited about this new adventure with the Aussie 7s," Williams said in May after signing a contract with Rugby Australia through until 2021.
"I've always loved rugby and to be able to potentially chase an Olympic dream through rugby is something I never expected. I want to grab this opportunity with both hands."
Australia have been drawn in pool B in Dubai alongside Scotland, USA and Ireland.
New Zealand are in pool C with Wales, Canada and Samoa.
Dubai Sevens groups
Group A
France, Argentina, Fiji, Japan
Group B
USA, Ireland, Australia, Scotland
Group C
New Zealand, Wales, Samoa, Canada
Group D
South Africa, England, Spain, Kenya.
