Heiskanen said his priority right now is becoming a stronger player.
"Skating is my biggest asset, but I know I need to get stronger," he said. "Those battles in front of the net and in the corners ... it's tough. But I feel I'm getting better and better all the time."
Stars general manager Jim Nill said veterans like Methot and Connor Carrick, and fellow countryman Esa Lindell, have been positive influences on Heiskanen.
"Methot played with Karlsson going back, so he's used to playing with those type players and it's important to have a veteran that can tell him what to look for in situations," Nill said. "Miro is a very deceptive skater. He's got a great glide to him and a real calmness. He's not going to 'Wow' you, but if you sit and watch him, you're going to appreciate what he does because he just makes all the right plays and never seems to be under pressure."
Heiskanen, selected by Dallas with the No. 3 pick in the 2017 NHL Draft, said he hasn't been too surprised with the transition to the NHL.
"It's pretty much what I expected," he said. "It's really fun to play here. I really like it a lot, the games are good and fast. I like the challenge."
Heiskanen tied for the playoff scoring lead among defensemen in Liiga with nine points (three goals, six assists) in 14 games for HIFK last season. He led all skaters in average ice time (26:16).
"He's what we expected, and probably a little more," Nill said. "We've watched him over the last couple of years, saw what he did last season in the Olympics and the World Championship. There's a lot there, but we have to be respectful of his age, too, because he's still only 19. But he's come over and seems in control."
Heiskanen arrived in Dallas in August to become acclimated to the area before the start of training camp.
"We thought he would need time to get all settled in; we forget sometimes we have to get other things in order, like the social security number, a car, an apartment, a bank account," Nill said. "He came over and in about three days, everything was done, but that's just how he is.
"How Miro is off the ice, is how he is on the ice. He's calm, smart and very engaging. Some kids just kind of have everything together, have their life in order ... that's Miro."