Hey @KatoZee that's a great thing you're planning.
I guess you'll not receive any answer from press@google.com unless you are press, they explicitely mention that on their website.
The best thing to contact a higher tier, would be to send a direct message to the Managers of Google on the social media platforms. For example Twitter. The names of the managers or higher Tier you can normally find in the latest Google presentations, as they are normally the ones which are presenting new stuff, e.g. on the I/O 2019 or the Pixel-Presentation, etc.
Another idea would be to write a letter to their headquarters. You'll find the address here: https://www.google.com/contact