I don't see the point to use it's own dns server for a single VPS. It is recommended to run at least two authoritative dns server for a a zone and it seems really strange to use a dns server which just references it's own IP address.
If you just want to learn how to configure dns records I would recommend something like https://desec.io/ . They provide the dns server infrastructure and you can configure the zones as you desire.
I don't see the point to use it's own dns server for a single VPS. It is recommended to run at least two authoritative dns server for a a zone and it seems really strange to use a dns server which just references it's own IP address.
If you just want to learn how to configure dns records I would recommend something like https://desec.io/ . They provide the dns server infrastructure and you can configure the zones as you desire.