If you are building a static website the above is probably all you need.
If you want your website user to be able store data on SAFE (ie a web app) you will need to be able to authorise your app with the network. This can be done now but it is not documented. Nor are the APIs for storing data, and many are still incomplete.
You can still build an app which lists and uploads files stored in the user’s account for example (with some limitations). I’ve done this, although it isn’t a simple tutorial style app I’m afraid.
If you want to do things like that, myself and others can help when you get stuck but I expect the browser APIs will be expanding again, and that documentation will be added for them before too long. That’s my new year’s wish anyway! 
My API related code is in a library: safenetworkjs. This was written for alpha2, but recent changes in the fleming-apis branch show how to authorise with the network, list and edit files, so if you are ok learning from other people’s code I can point you to the bits that are relevant, or you could just look for files that have been worked on within the last four months when I started updating it from alpha2 to Fleming: