Unduh aplikasi OpenVPN Connect. Unduh berkas konfigurasi dan sertifikat untuk layanan VPN yang Anda gunakan. Ketuk berkas konfigurasi yang telah diunduh. Masukkan informasi pengguna Anda. Ketuk "Connect" untuk menghubungkan perangkat dengan server VPN.

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
This is the official OpenVPN client for Android. It can be downloaded for free from the Google Play Store. It does not require root access for your device. You should be able to find these files on the VPN service's support page. You may need a File Manager app to open the ZIP file and extract the files. Select OpenVPN Connect when prompted which app you want to open the file with. You'll need to enter your username and password into the login screen. Tap the "Save" box to log in easier next tim