I love it! The enthusiasm you and your friend write with is infectious. I wasn't just reading it because you asked us too - I continued reading because it has the kind of tone that drew me in. And (I hope you don't find this patronising!) I would never have guessed that you are as young as you are. The way you both write is mature yet infused with energy, certainly refreshing, rather than the 'scholarly' (for want of a better word) tone of books and most websites that focus purely on facts and can be a little dull.
I especially liked that you both gave your own opinions and analysis of the portraits (your friend's on the portraits page, and yours on the Ship's Log, am I right?) , as it is easy to fall into the trap of copying other people's analysis and seeing what they see, if you know what I mean.
I can easily see this being something that could spark an interest in Nelson in young people particularly, but in older people also, especially people that would tend to think of history as a bit boring. I also like that you have videos, I think that's pretty unique.
Have you got any ideas for promoting it to as wide an audience as possible? My only concern is that Google relies on keywords in its searches, so yours might come quite low on its list if someone searches for Nelson as a keyword. But, on the other hand, I do like the name.
I'm looking forward to reading more, in fact I've bookmarked it

I hope you do continue to pursue your interest and turn it into a career. I'd actually love to see you two collaborate to write a book one day, I don't think I've seen anything specifically aimed at teenagers.
(By coincidence, I've also started a website and accompanying blog, as my partner is studying computing and web design and wanted to set up a website, and decided a good subject would be my obsession with Nelson. So if you happen to come across it, I'm not copying you, honest! But it's a different style to yours anyway).