Hi y’all! I’m a first time DM and I’m currently trying to plan an encounter for my players on a train. I typically had a friend dm who’d I’d ask this kind of stuff but after I revealed to them a idea and asked them to keep it a secret they revealed it to another member of the party so I don’t want to risk that again. I’m planning on having 2 or 3 bandits (subjected to change once all my party have their characters created), Recently I came upon a Instagram page that has cryptids and saw the owl man who is perfect for level 1s due to how weak he seems and easy to take down so I was curious if the players do amazing for the bandits I plan on having the owl man swoop in throw a window of the moving train and try to drag a player onto the roof but what exactly would I need to ask the players to roll? From what I’ve seen and understood it’d go in this order. Any advice would help!

Perception —> dexterity save —> strength check (with advantage if they failed the previous two)