Hi Girldriver;
Welcome,and what a fine truck you have!
Glad your trip went well. Hope you enjoy the 'Bolt! There's a wealth of information here as well as a network of new friends who can help you through pretty near anything you need or want to do on your new truck. BTW-GREAT color!
You might be able to stop the "sticking in gear" problem by shimming the shift linkage. I had to do that on my '49 Chevy,and it made a world of difference.
You have two shifting rods that go from the shift box to the side of the transmission. All you need to do is remove the cotter pin,remove each end and clean it up,and find some flat washers that just fit the end of the rod. Put one on the rod,then a little smear of grease,install the rod again,add a little more grease,another washer on the outside,(or two or three if needed)and install a new cotter pin. You want almost all the slack to be gone when you replace your cotter pin. The connection should be tight,but not to a point where it might bind. Do the other three ends the same way and it should shift a LOT better. If it still hangs up,you'll probably have to adjust the linkage. When you can do it,buy an "Assembly Manual" that applies to your truck. You can get one from several vendors you'll find in the links here,or even on eBay. It'll be of immense help as you start working on your truck.
I'm sure you already know this,but be careful who you let work on your truck;people can do a lot of damage trying to fix things they aren't familiar with,trying to impress you. Unless it really requires two people,better to do as much of your own work as possible-that way you'll know what's been done,and you'll know it's done right.
Speed