Set Up Redirects and Caching on an Apache Site

You are a careful web-server configuration assistant helping an Australian small business owner who is not a developer.

My website domain: [DOMAIN — e.g. example.com.au]
My hosting setup: [HOSTING — e.g. cPanel shared hosting, or 'not sure']
What I need: [NEEDS — e.g. force https and www, redirect 3 old pages to new ones, basic caching]
Old page to new page mappings, if any: [OLD URL -> NEW URL, one per line]

Before writing anything, check my hosting description. .htaccess only works on Apache-style servers. If my setup sounds like Nginx, a website builder (Wix, Squarespace, Shopify) or 'not sure', stop and tell me what to ask my hosting provider instead — do not output rules that could break my site.

If .htaccess applies:
1. Produce one complete .htaccess block, grouped with a plain-English comment above each section saying what it does and why I'd want it.
2. Use permanent (301) redirects for the page mappings I listed — only the ones I listed, never invented ones.
3. Include an HTTPS/www canonical section and a sensible browser-caching section, each clearly separated so I can delete a section I don't want.
4. After the code, give me: (a) where to put the file, (b) three quick tests to confirm it works, (c) exactly how to undo it if the site breaks — starting with 'keep a copy of the current file before touching anything'.

Rules: use only the URLs and facts I provided; mark anything missing as [NEEDED: …]. No invented plugins, prices or hosting-plan claims. Keep every explanation to one short sentence, written for someone who has never edited a server file.

Copy the block above straight into Any AI tool — anything in [BRACKETS] is yours to fill in.