Sorry, I should say more: I used to work in IT support and dealing with my mother's attempts to get to grips with Windows almost drove me mad. She's about 10 years older than your stepfather.
This was before the iPad so eventually I got her a Mac Mini which allowed her to do the church stuff (basic office type things), browse the web and email. And I didn't have to worry about her clicking on a random malware link. There was still a bit of a learning curve and some unlearning of the Windows things.
With hindsight (and more money) I'd have got her an iMac so she could use FaceTime/Skype.
You need to recognise that dialup is not a tenable option. ADSL2 is ok (for limited usage such as you describe) if close to the exchange but at 3 miles we struggled to get 3Mb/s which is not sufficient for streaming...
hth