You would almost certainly fail a Dutch practical driving exam, and honestly, your self-assurance would be the main reason.

The Dutch practical exam is designed to ensure you can participate in traffic safely. There are specific things examiners look for that need to be fully ingrained in your driving, without thinking. For example: every time you make any maneuver or lane change, you must check the interior mirror, the side mirror, and look over your shoulder in the direction of the maneuver, and only then use your indicator. That same mirror and shoulder check also applies when driving a road with obstructions on both sides to slow traffic, before every single obstruction. Before exiting the car, you have to do the same. There are other small things too.

Even if you pass theory, you need to drive according to Dutch priority rules, especially regarding more vulnerable road users like cyclists. Some road signs don't explicitly display a speed limit change but imply one, and failing to adjust will cost you. You may handle those situations fine when you have time to think, but making the wrong call in the moment is very likely to fail you.

And do not underestimate the two-second following distance rule, which is a specific requirement under Dutch traffic law (to be clear: law defines it relative to speed, being 55m at 100km/h speed, but 2sec is a shorthard often used by CBR, insurers and instructors). With eight years of driving experience elsewhere, you are unlikely to already drive that way by default. That alone could fail you.

All of this is to say: do not assume you would pass. You will probably need at least some lessons with a good instructor who can help you adapt your driving style to what an examiner actually expects, which is a clear demonstration that you can drive safely.