A hidden page for hosting training documents
WordPress training document – how to create a WordPress website
Free image websites:
pixabay – particularly good for vector images e.g. cliparts
Wikimedia commons can be really useful – not for beautiful images necessarily but for more technical images
Wikipedia itself can also be a good source of images. Again, just make sure you follow the rules of the licence. e.g. for the page on tyrosine, if you click on the image of the molecular structure (red arrow)…
…then the image file will open and at the bottom of that page will be the details of the author and the licence.
You can see this image is public domain – i.e. anyone can use it for any purpose. Others might have a licence that requires you to attribute the author.