I think it would be like drawing. If you don’t have aphantasia and have an epic image in mind, and basically only be able to put it down in stick figures.
In this case, you might know what strings to press and how hard to strum those strings. But you still need to get your fingers on those strings without tangling them and know how to pluck and strum them.
If you are interested in the subject, this is an interesting medium article.
And should you wish to go directly to the technical source, skipping Medium’s stupidity, here you go.