The ground missions aren't the strong suit but I don't mind them. Commanding capital ships simply requires you to find the bridge and sit in the captain's chair, there's no prerequisite for using vehicles.
Keep in mind that you can't take control of them when they're in hyperspace. In the regular game mode there's about 3 phases and the second phase is generally the attacking capital ships warping in. In territories mode there's a battleship, destroyer, and two corvettes per team right off the bat.
Keep in mind it's very much an early access game and while there's lots of upgrades it's still your basic shooter. I love battlefront so I love this game, but there are definitely bugs and placeholder assets (namely sound and the UI).