How to setup http proxy on OpenVPN access server

[proxyman333]

Hi there, apologies if this seems like a silly question, I'm quite new at all this.

I would like the following setup: android > openVPN access server > http proxy > internet

That is to say, I would like to put a proxy in front of my OpenVPN server so that my IP address appears wherever I like.

This is the part of the config file I'm confused about:

proto tcp
http-proxy xxx.xxx.184.95 5432
<http-proxy-user-pass>
USER(hidden)
PASS(hidden)
</http-proxy-user-pass>

First of all, is it even possible to do this?

Secondly, if I have a given proxy in this format (ip:port:user:pass), how would I put that in front of my access server so that this IP appears?

Basically trying to put a proxy on my VPN, the goal is to use a proxy via the OpenVPN app. Sorry for the confusion. And thanks!