Okay. This is a standard configuration straight from the wizard, so as long as Key Maps are enabled (Shift+Alt+M to toggle), Alt+F should make everyone follow, and when you press 1 everyone on your team will target the same thing as the active window, and also press 1.
If pressing Shift+F11 worked to follow, as you indicated before, then the ISBoxer Addon is confirmed to be enabled.
How can I take quests with them and interact? The version with the "interact" - (J) does not work and I did it like in the video.
You have yours configured for
Shift+J rather than just J, both for the Hotkey you press to make everyone on your team interact, as well as the Key Combination that gets sent to the game in order to interact. If the game is not configured with Shift+J for Interact with Target in the Key Bindings screen, then you should change this in ISBoxer under "Variable Keystrokes" -- select Variable Keystrokes in the top left pane, click Interact with Target in the bottom left pane, and then set the "Default Key Combination" to whatever is configured in the game.
Key Maps must also be enabled for this to work. (Shift+Alt+M to toggle)
Note that "Broadcasting Mode" should be off, usually. (Shift+Alt+R to toggle) Turn this mode on when you want to click through the quest window to accept or complete quests, etc.