On this page of The Witcher Monster Slayer guide you will learn whether you can disable quest tracking and how to do it.
In the journal you can find information about quests. To enter the journal, you must click the arrow at the very bottom of the screen (shown in the screenshot above).
The next step is to press the "journal" icon that appears on the left side of the screen.
Quest tracking can easily be turned off. This way, you don't have to worry about the yellow arrows and areas that appear on the map.
If you don't want to follow the storyline, just select the quest and click on the right icon.
If you do not want to track the quest, you should disable the "Set this quest as active" option. You can re-enter these settings at any time and turn on quest tracking whenever you feel like it.