Rose told The World Game he had already learned a lot from Garcia since the former Liverpool star joined the club and that the process was ongoing.
The pair will be teammates for the third time when Mariners play Brisbane Roar at Suncorp Stadium on Saturday night.
Asked how the Garcia experience had been for him, 18-year-old Rose replied: "It's been massive. He's a huge name in world football, he's played at the highest level and for him to come in and share his experiences and help out the younger players in the team like me, it's just great.
"l have learned heaps off him already and having him here has just been unbelievable for our team.
"When we're playing a game, he'll coach you through the game. If he sees something he'll give you advice on what you should do and just watching how he plays in the number 10 role, he gets into pockets of space and has so much time on the ball and weights his passes so well.
"At training as well, or away from the field altogether, if he feels he can say something that's going to help you improve and the team to do better he'll come and speak to you. It's always constructive stuff, because he wants the best for the team and the individual players.
"Just by him being here, he has helped the younger players already and given us a lot of confidence with his words. We take it on-board when he speaks and you can see the last two weeks we've gone up another level as a team and hopefully that will continue."
Central Coast wanted Garcia to not just be a player, but a mentor as well and he is clearly filling that role.
Rose said one of the big things with Garcia was his encouragement of teammates to try things and not be conservative just because of the fear of making a mistake.
"The main thing he wants me to do is just get on the ball and move it quickly," Rose said. "He doesn't want you to hesitate if there's no need. It's just pointers like that and you say to yourself 'yeah, I'll do that', and it helps.
"It's coming from a big name who has played at the highest level, so it makes sense you would want to listen to him and you want to try and impress him as well.
"I take everything he says on-board because, ultimately, he's trying to help you with your game and if he's doing that successfully the team's going to improve as well.
"If you see an opportunity and you try to play the ball through and it doesn't come off, he doesn't get into you for making a mistake. He says 'yes, well done you saw the pass, it didn't come off that time but it was the right idea'. He's been a massive help so far."
After a 2-1 home loss to competition leaders Western Sydney Wanderers followed by a 3-1 away win over Wellington Phoenix, Rose said the Mariners were feeling good about themselves.
"We've thought all season that we can push the top teams, but we hadn't been taking our chances and it hasn't been the season we wanted," he said. "But in the last few weeks, especially with Luis Garcia coming in, you can see the confidence growing.
"We had a chance to go 2-1 up against Wanderers and missed an opportunity and ended up losing that game 2-1, but we took a lot of positives out of it and then we went to Wellington with a lot of confidence and beat them, which was massive because we hadn't won an away game for two years.
"Brisbane were a bit out of form, but then they got Jamie Maclaren and Brandon Borrello back from the Olyroos last week and came back to form against Sydney FC, so we know it's going to be tough. But we know what we have to do to win and we'll be doing our best to pull it off."