There should be a big 'skip training' button in the top right.
The Myrmidon has received only the lightest of upgrades. You can look at a comparison of it
here to make sure you have the (only slightly) improved sort. Somebody should do a new highpoly version of it some day.
On the first actual combat mission you should see a big plume of fire come out of the Belisarius when it gets beamed - if you don't, your MVPs are presumably broken or installed wrong, but we can sort it out. Alternatively, go into the techroom and look at the Hercules; it should be clearly high-poly with a little man in the cockpit.