Van Gaal will return to Europe with the rest of the Holland squad on Sunday, 24 hours after the 3-0 win over Brazil which sealed third place at the World Cup.
But he is in no mood to take a long break despite his busy schedule in Brazil and will only have a couple of days off before heading for Manchester in midweek.
The Dutchman signed a three-year deal with United before the tournament to take over from David Moyes, who lasted less than one season at Old Trafford - they ended last season in seventh place in the Premier League and missed out on European football completely.
Van Gaal has since, with the help of members of United's backroom staff, overseen a couple of high-profile signings in Ander Herrera and Luke Shaw and he is expected to remain busy on the transfer front.
United have been linked with Juventus midfielder Arturo Vidal and Real Madrid winger Angel Di Maria and Van Gaal is keen to get down to business on and off the pitch.
"That is no problem for me, I don't need a holiday. It's great to have such an exciting challenge," he said after the win in Brasilia.
"To work daily with young people is something that I don't need time off to rest for.
"I'm looking forward to it. I've only met two people from the daily management at the club - the chief scout and the chief executive officer. And I've met two of the owners. It's time that I get to know more people at the club."
Van Gaal will spend two days at United's training complex before heading to the United States, where his new side is scheduled to play at least four matches.
His first game in charge comes against the LA Galaxy on July 23 and is followed by matches against European giants AS Roma, Inter Milan and Real Madrid - they could have a fifth match if reaching the final of the eight-team tournament which concludes in Miami on August 4.