I had a Miracle Whip and it is a nice portable receive antenna and it is possible to make contacts with one but it is really hard going. I sold it a while ago but being a glutton for punishment with more money than sense I decided to get another one except this time I went for a UK made equivalent called the Wonder Wand. I recently tried an experiment switching between the Wonder Wand and another short portable QRP HF whip called the ATX Walkabout which I think is sold in the US by MFJ. I used WSPR, a low power beacon mode which enables you to get accurate reception reports from all over. The ATX is a more conventional design using tapped base loading coils. It needs a resonant counterpoise and I used a steel tape measure. Both antennas were mounted on the back of an FT-817 sitting on the desk here where I am now, so it is a similar situation to what you are contemplating. The ATX was so vastly superior to the Wonder Wand that it is debatable whether it really deserves to be called an antenna. It's a pity I didn't have the chance to perform this same test on the Miracle Whip but I doubt if the performance would be much different as they both use the same design principles. So if you are going to do this, forget the Miracle Whip and get an ATX and a steel tape measure. On the other hand, if you really want to make contacts get an MFJ magnetic loop and mount it on a stand. It's a lot of money but it's the next best thing to a full sized outdoor antenna. If you can't afford to buy a magnetic loop try making one. It's not too hard for QRP. It's when you want to run 100W that it gets difficult because it's hard to get tuning capacitors that won't flash over.