Once that's off the plate implement a suitable Win 7 compatible database or accounting suite for record keeping that a computer illiterate senior could use with some minor help without too much hassle - figuring simple spreadsheet for their data output they will need in the end.

If I've time after all that, I'll put thoughts how to best reach Australia's weather bom site's [1] designers who for accessibility moved their site's performance from great or excellent to total crud. Even the android phone does not display any better. If I ever needed an example of enshitification ... They need a fall back for those who's devices don't work well or just want to use less bandwidth every time they check their local radar.

[1] www.bom.gov.au