I've honestly have little experience with other roguelikes so I can't make a qualified comparison.

It can be challenging but I wouldn't call it complicated. Difficulty is mostly based on vehicle choice. If you go with a Stewart tank instead of a Sherman Firefly be prepared to retreat or call for support if a Panther is barreling towards you.

It's turn based and all commands are on keyboard. You tell your crew what to do, move the tank, fire the weapons and then it goes to the enemy units. There's a lot of buffs and factors to consider like weather ammo type etc but the core gameplay is a easy to learn hard to master kind of thing. If your tank gets knocked out you'll usually get a turn based minigame where you try to tell your crew what to do to bail out. Surviving crew keep their skills experience and can fall back to get a new vehicle and fight another day.