As you want to maintain this document then a single table is easiest. To aid alphabetical sorting I changed the position of the asterisk to the end of the course name so you can use the Table > Sort feature. The asterisk has its own Character style, Big Asterisk, so you can change the appearance to suit.
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As you are using 26.8 then you have a bit more control over the table styles. For your document, I created a new table style, U3A, and made sure it applied just background row colour and pattern, I left the last row set as Automatic so it will continue the pattern instead of applying its own background colour.
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I changed Default Paragraph style to Arial 12 and added your new styles as subsidiaries of Default Paragraph style. I removed all the blank paragraphs and set the two images As Character so they could be centred nicely
The entire document is on A4 size, the intention is to print as brochure so each page will be A5 size. You can either print from LibreOffice, or if you are getting it printed elsewhere, export it to pdf and get the printer company to print as brochure, Adobe Reader is happy to print as Booklet (brochure). As a final option, you could print to pdf as brochure and have it printed normally.
Schedule Layour Sept 26_137386EA.odt (67.1 KB)
Schedule Layour Sept 26_137386EA.pdf (79.0 KB)