Really sorry to hear that Elizabeth.
Looking again, I can see I misread your details, mine are much higher.
I suppose I don't realise how fortunate I am really!!
I recall, back in the late 80s, an early internet, connected to the telephone, used 1200/90 baud. Needless to say, there wasn't much available, mostly universities and such and they tended to keep most pages private.
One in particular, which connected several universities in London was called The Gnome At Home. The graphics were basic block, so no fancy pictures. They had a 'Main Page' where you could join in some conversations on topical issues. But it was horrendously slow.
Anyway, a few ideas to be getting on with. Yours are naturally good, mine might be a little more drastic, though I can say, I've done all of them in the past, with few problems.
The most important, apart from Elizabeth's is to turn off automatic updates and remember to do updating yourself. Use a decent browser, which doesn't feedback information or run scans on every single page. Get a decent ad blocker, Flash Block if you have Firefox.