Hey there Sebastian,
Welcome to planDisney and thank you for your question! It sounds like you're planning a trip to the Happiest Place on Earth for next month - how exciting!
Currently, to enter one of the parks of the Disneyland Resort, you need both valid
theme park tickets and a
theme park reservation for each day that you plan to visit. Therefore, for your example, you would need 2-day theme park tickets to visit on Friday and Saturday and would also need to make theme park reservations for both days as well.
If you haven't purchased your ticket yet, then I would recommend buying them through the
Disneyland Resort website as it will then connect them to your MyDisney account and you'll make your theme park reservations as part of the purchase process.
If you've already purchased your tickets, then you can make and manage all the different reservations from the
My Plans hub! This is a really convenient page that will show you the details of your upcoming trip and the My Plans hub makes it easy to modify your current plans since everything is together in one place.
Thanks again for your question, Sebastian! I hope you enjoy your visit to the Happiest Place on Earth next month.
Have a Magical Day,
Greg