Hi Zini, Welcome to the Forums.
Try adding a point light inside of your Character Blueprint. You should be able to tune the intensity low enough that it just illuminates nearby things.
You should also be aware that there is an eye-adaptation system on by default in UE. (simulating how our human eyes adjust to dark/bright rooms) - Disable this by turning off ‘Auto Exposure’ in Project Settings if you think it’s interfering.
Let us know if you have any questions about how to add a point light to your character.