First, you'd have to learn programming.
So I expect it's a fairly long term project for a newbie.
If you're not worried about filters and pich shifting, then you don't actually have to learn DSP
to make glitchy delays and stuff.
...but you still need programming skills.

I thought the video was a bit misleading where it implied you could start with their example of a filter module and be able to futz about with it without ant knowledge and be able to come up with something interesting right away.
In reality, even if you already had programming skills you'd be spending your first day or so just to make the LED flash.
...and to understand filters at all there's some pretty intense math to go through.

So the answer is at least "weeks", probably "months", and possibly even "years".