Milestones
Open the milestones tab below issues.
Create a new milestone. You can come up with the title yourself, but it is recommended that it includes numbering or some other reference so that you can understand which sprint it is. Also, specify the start and end times; for the first sprint, for example, from February 10th to February 23rd (start time would be the day after a week's hour, end time would be on the same day a week later).
In the description, add the description of the corresponding sprint in your project plan. This way, the sprint plan is directly visible, and you can also mark what was done and what was not. Tasks that are not completed can be moved to the next sprint later.
Bonus: you can also pre-create future milestones if you want to plan ahead more precisely.