I use Tecno F1 with Android 8.1 Go edition. All the Google apps on it are the "Go" versions but I want the original ones. If I try to download them however, I'm not able to do so.
The Go OS is for entry level phones that don't have the hardware to run full versions.For example it has 8GB of storage and 512MB of RAM. It will only support GO versions although you could access YouTube using your browser.
Welcome to Android Central! Galactic Zoo is absolutely right. This is the whole point of Android Go phones. If you want the full functionality of those apps, don't get an Android Go phone.