Let me start by saying excellent pictures.
Everything that you are showing is PMD, I cannot see any true errors anywhere.
Sometimes it can be difficult for new collectors to tell the difference between errors and damage. One thing to remember is that it is only an error if it happens during the actual striking of the coin, anything that happens after that is damage, even if it happens in the mint. There are a limited number of things that can happen to create an error but there are countless things that can create damage. Things like dings, scratches, distorted letters, markings that appear to look like numbers and letters, discolouration, counter stamps are all considered damage.
By reading some of the numerous websites available, you can quickly begin to learn the differences. Here are two that I find are informative.
error-ref.com
wexlers