Here are some resources that may be useful:
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Creating accessible PDFs from InDesign: Creating accessible PDFs
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Accessible PDF with Adobe InDesign (PDF, 1.4 MB): https://www.adobe.com/content/dam/acom/en/products/indesign/pdfs/creating-accessible-pdf-documentw-with-adobe-indesign-cs6-v3.pdf
We cannot endorse specific training providers, but a search term like “Accessible InDesign to PDF training” may provide you some results like videos, training providers and other resources for you to check out.
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