Great to see you make your first post on Workshop. Many thanks for joining in the discussion, we're pleased to have you join us and look forward to seeing how your project progresses.
Workshop is a place for our members to provide assistance and inspiration to each other. I'm sure our members would be happy to provide help if you need any specific advice about how-to install your clothes line. Have you selected a unit yet?
If you would like to attend a hands-on workshop at a Bunnings store, I would recommend you check with your local store via this page - https://www.bunnings.com.au/stores/vic/craigieburn. The team at Craigieburn should be able to tell you if they ever have a hands-on workshop on that topic.