Where do I go to connect my VPN and how to connect it also

See the following Apple articles:

If you can’t download or update apps on your iPhone or iPad

https://support.apple.com/en-gb/HT207165

Require a password for App Store and iTunes purchases

https://support.apple.com/en-us/HT204030

If it is not available in the App Store then it can't be downloaded.

Even VPN services will not help you with this.

Actually yes you can download fire kirin fish game even though it’s not available in the App Store. It’s from a third party developer and I have downloaded on my iPhone numerous times in the last couple years but right now there’s an issue with some aspect of the app as is common when new iOS update happens so it may be a few days or few weeks til it’s fixed and then u can download fire kirin. I wish they would be faster but it is what it is I guess. I really enjoy the game a lot and miss playing it

Then you are sideloading the app and we cannot help you with that.

Any apps that aren’t in the app store put your phone at risk for hacking and spyware, as the app has not be tested by Apple to determine that it is secure. It is very easy to get a legitimate app approved for the App Store, evidenced by the fact that there are well over a million apps in the app store. So an app that cannot get approved for the App Store is almost by definition dangerous to use and will most likely include spyware or other malware.