I would have to agree with one of the other comments to kind of clarify who it's for. If it's just your personal portfolio page, then that's going to be a little difficult. I'd love to work with you on getting some law firm clients! I've thought about breaking into that niche. As for additional pages and SEO, that is kind of a rabbit hole. You may not want to open that can of worms. A focused landing page with clear CTAs is going to outperform an SEO loaded website with a thousand options. People get overwhelmed and just do nothing. I really am more into CRO and paid ads as opposed to SEO. And the best part is you can turn the lead flow up and down as you please!