You have options for hosts,

https://contabo.com/en

https://www.hetzner.com/

https://www.digitalocean.com/community/tutorials/read-large-text-files-in-python

Thats your software https://github.com/LemmyNet/lemmy-ansible

general process

1. rent computer at host
2. install asnible on YOUR computer
3. configure ansible as instructed in repo (mainly tell it your connection info to the host you got)
4. run ansible
5. profit

you can remove and reinstall as many times as you need to get it right.

you will also want a domain name, namecheap among others are good, I like to use cloudflare for my application firewall. I can walk you through any of this.

if you can put up with a sometimes grumpy greybeard that means nothing by it, I am happy to show you the ways.