if you're a technical person already, consider archiving! have a favourite blog with some obscure information? a niche website from long ago you fear may go under? Archive It!
ArchiveTeam's grab-site tool makes it extremely easy. Here is literally all it takes to archive a website: grab-site URL
a great followup is posting it to the internet archive! here's a template for uploading your resulting archive files using the archive.org cli, based on some research from @iliana:
ia upload warc_websitehere_yyyymmdd warcs-folder/*.warc.gz -m mediatype:web -m collection:opensource -m title:"WARC: websitehere yyyymmdd" -m subject:warcarchives
think it's neat? archive it. its very satisfying.