Fitting in this late in the season is especially difficult on a team that, in the words of Greg Monroe, is playing at “a high level.” The center will play his fifth game with the Celtics tonight against his first NBA organization, the Pistons. He spent the All-Star break studying everything there is to learn about his new team. That’s because the learning curve is steeper later in the season – in the case of the Celtics with only 23 games left before the playoffs. “Yeah, especially with a team like this playing at a high level that probably doesn’t need much change,” Monroe said before this morning’s shootaround at Little Caesars Arena. “Just get in and try to help in any way possible. Just about bringing my skills and adding to what they already have going. “It’s been smooth, just have to learn how things go,” he said. “I think I’ve picked up everything pretty quickly – every team has things they run, and the language might be different, defense, coverages, rotations might be different, just about learning that and getting comfortable with the players.” The short window considered, patience can also be difficult, but that is precisely what Brad Stevens recommends for Monroe.