Eh, no need for IO, just karkand generally. Sit at the back of the map prone and under cover (UNDER, not just behind. Remember, the other guy will arty non-moving blobs), direct your squads according to tactics you've seen pulled and the red dots you see moving, and remember the order of assets:
Scan
UAV over the largest battle
Spot the rest
Arty enemy concentrations without your own troops nearby (with own troops, you risk being autokicked for TKing)
Supply drops where friendly tanks will be soon or are battling
Vehicles on outlying blue dots.
If anyone requests and NEED it, give them priority.
Also, commend squads a LOT when they follow orders. Positive reinforcement, and they'll be more willing to do it in future.
Commander points are the total teamwork points made by the team. Flag caps, resupply, repair, healing, damage assists, and revives. Possibly asset blasting.
Identify chokepoints, set squads to hold them, and arty troops being stuck in it. Blow bridges.
Also, kit choice is important. Medic gives you health icons over troops. Support, ammo icons. Engineer, vehicle health.
Beware of assassins. The trend is now to sneak up and knife commanders, so ideally command from somewhere that gives you warning or makes it impossible. The middle of the ocean, or the guts of a carrier work, as do squatting under a hut in the uncap.
Commanding is good for your KDR! All your arty kills count towards global kills. You will die about 5 times if you're unlucky. It's also good for kit time, useless-vehicle time, emplacement time (AAA on air maps will get bombed a lot), and play time.
Commanding makes you a better soldier! Once you start to see patterns and maps and strategies, you'll be able to put them into action.