I think you're misunderstanding a bit. Those are both written languages only, but some may speak closer to one than the other. My speaking would be pretty close to bokmål, as I have "no" dialect.

Nynorsk is a mix of lots of various spoken dialects. No one really "speaks" nynorsk, but for many it's closer to how they speak than bokmål would be, but it's still not 1:1 for them. The only way you really would "speak" nynorsk if you're reading a play or something written in it.