There are student discounts. No senior citizen discounts. You could take courses at a Community College, perhaps.
The Photography plan is only $10 a month, which gives you Lightroom and Photoshop, and it also gives you access to some small programs. Not Dreamweaver. But if you have Photoshop, you could find some very inexpensive, even free programs for creating a web site, if that's what you want Dreamweaver for.
You can check out their plans for individuals, students and teachers, businesses, etc. here: