The 19-year-old attacker believes Sherwood's noted faith in youth will help him flourish at Villa Park.
Grealish, 19, made his first-team breakthrough at the start of the season but had seen limited league action in the months following, earning just 10 substitute appearances for a total of 249 minutes prior to QPR’s visit.
He has impressed when given the chance to showcase his potential, however, including in game-changing cameos against Leicester and West Brom, and Sherwood felt confident enough about his talent to throw him into the line-up for the crucial clash against their relegation rivals.
The emerging teenager proceeded to put in an encouraging 70-minute outing before going off for Joe Cole, standing out with his pace and skill, and is now bidding to earn more opportunities during the final run in.
With Sherwood developing a reputation for putting his faith in homegrown talent during his time at Tottenham Hotspur, where he helped develop the likes of Harry Kane, Ryan Mason, Andros Townsend and Nabil Bentaleb, Grealish believes the former Spurs boss is the perfect gaffer to help him flourish at Villa Park.
"Playing my first game is probably the highlight of my career at the moment,” said Grealish. “To start for my boyhood club was a dream come true and I thank the gaffer for that.
“You can see what he did at Tottenham with the young lads, bringing them through and just the way he is around the training ground.
"He is a great guy. He's given me my first start in a crucial game which I'm really grateful for."
"He's done little stuff around the place like bringing the younger lads to come and train next to the first team.
"That might sound like a little thing but it means so much to the younger lads. He's so positive around the place and gives everyone a boost."
As well as bidding to retain their top-flight status, Villa also have an FA Cup semi-final against Liverpool to deal with later this month, when Grealish is hoping to earn another start.
The Birmingham-native was there as a fan for the club’s last two trips to Wembley in 2010, when Martin O’Neill’s side lost both the League Cup final to Manchester United and their FA Cup semi-final to Chelsea, and he is hoping to experience better fortune this time.
"I hope towards the end of the season I can play more of a part and help the team stay in the division. It would be brilliant to stay in the team for Wembley,” he added.
"I went twice to Wembley as a fan, for the United and Chelsea games. Unfortunately we didn't win either of them, but hopefully this time we can go and get a result."