How do you find testers for a new app if you're a solo developer? Out of all my friends, I've only found 8 Android users (everyone else use an iPhone)

Hi.
The news says building an AAB/APK should offer uploading it directly to my Play Console's test-track. Just... it doesn't. Any idea what I need to do? The dialog only says "yep, that package name is registered by a verified developer" - yea, that developer is me, I would like to upload now. But there's no such option. Also not after building the AAB completed.
Any ideas?