You can accomplish these missions by playing as normal in your game, but keeping an eye on the requirements of each mission.
These requirements will be shown to you when you click on the Quest, along with other things such as:
* The character that represents the mission;
* The point requirements for you to pass the mission;
* The missions that are part of the quest;
* How many points that you’ll receive;
* The reward that you’ll get upon completing that quest;
You'll only be able to activate one quest at a time, and a mission will only be eligible for progression if you selected it as active.