Regarding the links you couldn’t post: I’m just guessing, but maybe it is some kind of spam protection for new users on this forum. So you can only post a certain amount of links to a unknown domain.
Advanced HTML text 1: Correct!
You used three <dd></dd> inside, which is perfectly fine according to the specification (I had to look it up ). Normally you would use just one <dd></dd> around all three sentences to get a continuous text.
Advanced HTML text 2: Correct!
Tiny remark: You should always use two digits for months and days in (machine-readable) dates. (datetime="2019-11-02" instead of datetime="2019-11-2")
Keep up the good work and have a nice day!
Michael