If you're wanting to create your own website or online service, you will probably need to buy a domain name at some point. (Domain names are things like "wikipedia.org")
I've done a beginner's guide to domain names, specifically aimed at non-technical people who want to get started with making their own online things:
https://growyourown.services/a-beginners-guide-to-creating-and-using-your-own-domain-name
If you have any questions, corrections or comments feel free to add them in the replies
@homegrown
Looks like a nice primer into domains :-)
1 suggestion: use the terms renting or leasing, instead of buying. You mention it in your description already, but it might help people to realize it even better.