No you didn't post in the wrong section , I'm assuming the more active members were just sleeping.
Regarding your question about using your own CSS in combination with bootstrap. I don't think that you over complicated it, however I think it would be worth considering whether or not you actually need to use Bootstrap in the first place.
Bootstrap is a bit opinionated in that it 'wants' things to look like Bootstrap, this can end up making your life a bit difficult when you want a more custom look . Having to use !important to override styles isn't the most elegant way of going about styling either.
Also, especially when starting out, Bootstrap and other CSS frameworks can end up being crutch. I found that trying to do everything in pure HTML and CSS helped out a lot when I started FCC.
In terms of design, I'm not a huge fan of how Bootstrap makes things look. I'm sure that you on your own could make it look a whole lot better
I'm sorry to hear about the loss of your father. From what I read in your Tribute he seemed like a very interesting man. "Hacer Aprendiendo", that's what we do here at FreeCodeCamp
Thank you for sharing your work and good luck with your subsequent projects!