Install Google Play Services Huawei P40 lite?

I have a Huawei P40 lite and I need some information on how I can best use Google Play services (Playstore etc.). I already checked out youtube but the various apk files don't really work. Does anyone have an idea?

I also have a Huawei, but luckily I already had Google Services with me. But there's an application called Chat Partner, which you can download with this link: https://c.gmx.net/@324819600321544370/7JDg1VMJSfSNqDSrZEfhZg To install the application, you have to activate in the settings under the item "Security" that apk-files can be installed. This application works as an error detector and offers the function that errors can be corrected by the app itself. If you have installed the application normally, give it the necessary permissions. Then tap on "Detect device" in the app. An analysis will now be carried out on your device, it shouldn't take long. When the analysis is done, a problem should be detected: "Google Play Services not installed". Just hit "fix problems". Then an installation process starts, which takes about 5 minutes depending on the internet speed. Once this process has been completed, the Google Play Store, etc. Should be installed.