Any Linux Guru's out there that can help me with a CentOS 7 CLI OpenVPN setup?

Hi, i have been beating my head against a wall trying to figure out how to get OpenVPN working on an old laptop i have. i have searched the internet trying everything but for some reason it work stay up or start at boot. I have tried it on my raspberry pi and i haven’t had this kind of problem. any good instructions out there that i can try or anyone that can help?