If you have your own website and want to direct students from your website to your Namastream site, you can simply create a button (or link in the header, copy, menu or sidebar) and add a hyperlink from that button to your Namastream site.
There is no need for i-frames or complicated coding. It's simply a hyperlink that sends the student to your products on your Namastream site.
You will want to think about where do you send your student, so choosing the right link is important. Check out this article that explains all the links and when to use them.
Read the next article: What If I Don't Have a Website?