Helping local business going online, is it worth?

I’m based in Australia and I see many local businesses with great products or service but lack strong online presence. I’m wondering if there’s a gap in the market where I can help people setup their online side of businesses.

Is this something worth doing? If so, how do I validate demand? How do I know if people even actually care about going online?

All of this is just an idea. Any feedback is appreciated!