to be frank though, this tree could probably benefit from a hard cut back at some point, you'll be a little scared to do that now as you want to enjoy your new purchase. but if serious about taking the tree forward later down, it would likely need to be cut back and re grown. the inner buds need to be stimulated, you need some interior twigging.
like i did here in pics
this elm was pretty to look at, but similar to yours, you can see where it lacked interior growth and many branches were actually somewhat leggy and lacked genuine taper, i see the same in your tree. do you get that?
IMG_6461 by
Bobby Lane, on Flickr
IMG_6473 by
Bobby Lane, on Flickr
it was a strong grower, but still, it lacked interior growth, but it was getting there, but those long branches still lacked genuine taper
IMG_1039 by
Bobby Lane, on Flickr
so in the end, to take this tree to the next level i decided to cut it back ruthlessly. yes it was pretty to look at before
it was just pretty, but it lacked real quality
june 2017 by
Bobby Lane, on Flickr
everything was cut back to the closest nodes/branches, closest to the trunk. some branches were just cut back to approx 2in, being a healthy elm it buds back no problem
june 2017 by
Bobby Lane, on Flickr
july 2017 by
Bobby Lane, on Flickr
july 2017.. by
Bobby Lane, on Flickr
IMG_6951 by
Bobby Lane, on Flickr
still in development, but it will be better than it was before eventually