Yes, хуй can also be used with в instead of на, so the ‘on’ is better than ‘to’. However, we could combine the two to be even more accurate and imply the motion: ‘go onto dick’. We can also improve the translation by adding an article: ‘go onto a dick’.

Alternatively, we can make a slightly more idiomatic translation by fiddling a bit with the verb: “get on a dick” is my favourite version of this, conveying the meaning well without sacrificing too much accuracy.

Prepositions are fickle. For example, in Swedish you can learn just 'på' and be fine in 90% of situations. :)