You can use typst locally and bypass the commercial bits. It is really easy to create different kinds of documents with it. I have been using it to create slides and handouts, and for that I already find it much easier to use than the alternatives.
Look at Quarto. Markdown input, basically any output you want, including HTML, PDF, DOCX, PPTX, etc... All from the same input. Reuse text chunks, use variables, templates, and more. Then just run 'quarto render'.
