There are lots of experts but as for who wants to help that is another question. Most affiliates spend their time working on their own SEO. You might be able to find a good partner to work with but this part of the forum is best for asking questions or trying to get tips.
If I’m not mistaken, you are looking to rank your site for a few thousand specific keywords right?
I would start with content. Pick 10 phrases, make content that uses them and include them in your site. For long tail keywords it is easier to rank because so a decent density and a few links with them as the anchor text and you might show up fairly high. I hope this helps.