Sorry for the late reply. Glad to be of assistance!

I'm going to start with the e-book, and once I finish that, I'll probably look into HPMOR!

That seems reasonable. A thought of mine on the sequences: they could be a bit dense and difficult to understand at times. I think some version of the 20/80 rule applies, and I'd approach the reading with this in mind. In other words, there's a lot of material and a lot of it requires a lot of thought, and so a proper reading would probably take many months. And it would probably take years to achieve true understanding. However, there's still a lot of really important core principles that you could get in a couple of weeks.

should I read the original Harry Potter first?

https://news.ycombinator.com/item?id=9203769

Personally, I think that knowing the gist of the story is sufficient.

I saw some of your other comments and see that you still have a lot of questions and are a bit hesitant to post here before doing more reading. I think that people will be very receptive to any sort of comments and questions as long as you're open minded and curious. And if you ever just don't want to say something publicly, feel free to message me privately.