>>96859602
It's more complex than 40k (at least current day 40k I guess) but not impossible. The things to remember are:
>you need one lieutenant
>you want a heavy hitter, someone armored and mobile and with a nice gun
>you want a couple of good hitters if the heavy hitter dies
>you need specialists to complete objectives. Anyone with a special skill (hacker, medic, engineer, etc.) is a specialist
>you want cheap units to provide enough orders to the above and cover your flanks
After that you can customise and decide if you want to lean into a lot of mechs, hackers, mimetic skirmishers, jump troops etc.
The app is a bit complex but imo it's quite good, if you mess up it will tell your list is illegal and why. Imo the most complex thing is fireteams, see pic related, but they are meant for more advanced players desu.

What's an abstract mission?