Your tiddlers will be saved on
If you're starting on the TiddlyWiki world, you can just visit https://tiddly.alhur.es/, login with your remoteStorage account on the widget and start adding tiddlers! Your TiddlyWiki will be viewable to anyone on
https://tiddly.alhur.es/<your-remotestorage-address>/<chosen-namespace>/ at any moment!
Just remember that, to avoid causing problems to visitors, the wiki displayed at
https://tiddly.alhur.es/<your-remotestorage-address>/<chosen-namespace>/ will not save its edits, not even if you're the one browsing it. To edit and have your edits saved to remoteStorage, go to https://tiddly.alhur.es/ only.
(If you already have a TiddlyWiki and wants to migrate to this remoteStorage-based setup, you'll have to install the plugin on your own TiddlyWiki wherever it is and somehow push all your tiddlers to remoteStorage -- after that you'll be able to use https://tiddly.alhur.es/ normally.)