That's a pretty good overview of how telescopes work. The only negative is it only very lightly covers what different types of objects there are to see though! A few pictures of what the various objects look like, and there relative numbers, before the mention of what scope goes best with viewing what objects might be a great addition.
Some other suggestions for your site:
1. Its been well proven that white font on black background is alot harder for the human eye / brain to read than the reverse. Also maybe add a few paragraph breaks.
2. All your telescope links point to the same webpage, so maybe only 1 is needed
3. The font on the telescope optics link is a bit too small
Finally a definition of what there is to view will help deciding on what scope is most useful, and the section on mounts could be expanded.
Its a very good start.
PS
When folk retire - if they're not into expensive sports or shares or travel or if they simply have a winfall of cash then they might just wnat to splurge. More money then sense as my grandma used to say - but perhaps they know that and wish to rapidly gain knowledge to focus their budgeted spend before their wife appropriates it on a fur coat or a hairdo or expensive painting etc
