OpenVPN server configs with dynamic DNS (No-ip)

Hi !

I have configured No-IP ddns.net succesfully on my Mikrotik and it works just perfect. However, I would like to add OpenVPN Server function on top of that and having both dynamic DNS and OpenVPN server working together. How should I configure my router in this case?
I have followed the link (https://wiki.mikrotik.com/wiki/OpenVPN ) and came this far;
1, created certificates
2, added new IPpool
3, New PPP profile
3, PPP secret
4, Enabled OpenVPN

Which step should I take next? I am using ubuntu 16.04.2 .
I am having problem with understanding the certificates part I guess.

Kind regards,

Hello may help
https://manuth.life/openvpn-server-mikrotik-routeros

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