Recreational / Hobbyist UAS pilot reported that they learned during post flight they flew within an active TFR without authorization.

Narrative

Last night I decided to fly my drone on the other side of the river to capture some footage of the city in smoke from the Canada fires along with the stadium. Last night there was an event; and I thought I was being respectful of avoiding the stadium. However; I was not aware of the [TFR] rules of it needing to be over 3 miles away an hour before and after the event. This is completely my fault and I should've done more research. However; I made sure to absolutely not go near the stadium or over the stadium. However; I was definitely within 100 yards at takeoff. This is something that I was not aware of and I'm going to go out of my way to also take the drone flying course. I did not know that recreational drone pilots needed to take the TRUST (The Recreational UAS Safety Test) course so I will be doing that as well. I will also be going out of my way to get my 107 license to learn more about the other rules that drone pilots may not know about. Overall; I would like to apologize for my recklessness; and I do realize that I have made a mistake in which I thought I was respecting; but greatly violating. I will do my best from this point forward to educate myself; and make sure that nothing like this happens again. I respect everything and all the regulations that were put in place for this event; and it is my fault for not making sure that it was perfect. This will not happen again and I do apologize.