You will have to test this for yourself to be sure how it affects you.
Though I know from people born with MercRx that they are mostly immune to the effects of Mercury retrograde as a whole, and in some cases can even have an opposite effect where the aspects ruled by Mercury are boosted for them while Mercury is retrograde.
The affairs of Mercury are more difficult and prone to obstacles for people born with MercRx in normal times, but during Mercury retrograde it appears as if for these people it can be like a fish returning to the ocean, the natural environment where they thrive and all affairs of Mercury will be easier for them.
This and the extend by which this happens most likely has to do with how strong your natal Mercury is, whether it is a chart ruler or not, and other factors that make it more or less central to a persons life.