To get a new public IP for a SOCKS5 proxy, you can set up a dynamic IP router that disconnects and reconnects automatically, triggering a new IP. This can be automated with a script restarting the WAN connection or using a VPS with a SOCKS5 server like Dante combined with a dynamic IP service. But that works for one active connection.

and how does one create a proxy?

dont't waste your time with buy proxys.. create your own virtual proxys.. the stupides buisiness.

i wont say how much i could get the proxies for BUT calculating how much bandwidth i would use per hour with runescape and how much these IPs cost, to run i would be making a decent profit in the end, BUT i need to get a discord bot up and running which means i would need to learn python XD

What script are you looking for?