Help

Hi guys I got this car 2 months ago its is a 2020 2.0T and drive it everyday. Yesterday after parking it at night and in the morning when I got to start it its taking longer and heavier cranks to start , even after driving it several kms its still the same runs and drives absolutely perfect but isn’t cranking right. I think it needs a new battery but there are no signs on the dash. The warning light is ON because of the low washer fluid. I want to go to the dealership but it could be expensive. Any ideas on what is going on is very much appreciated.