There’s no too many. A lot of internal links tells Google that page of yours is important relative to the other pages on your site. Much external linkjuice you get will thus also go to that page, nothing more to it

It might appear under the shortcuts in the SERPs when people search for your website, and so on. That page will become stronger relative to the other pages on your site, so if it is that important it is that important, internal link as you see fit. It might end up being considered more important than your startpage when people search for your brand if that is what you want, so completely up to you and what you want