Anyone else using a library card to get free LinkedIn Learning and blast through Excel/Power Query mini-lessons? I do one 10‑minute video at lunch, recreate the example in Google Sheets, then time myself cleaning a 200‑row CSV — my QA error rate dropped from 3% to 0.8% in two weeks; got other cheap or free CE tricks that stick?
I piggyback your routine with OpenRefine (https://openrefine.org): grab a messy CSV, do a 10–15 minute ‘facet → cluster → fix → export’ drill, then compare before/after against a saved QA checklist. It’s free and the cluster step catches inconsistent names/IDs faster than Sheets, like push-ups for data hygiene. If your library has O’Reilly or Udemy via card access, that pairs nicely for quick regex or QA mini-lessons.