All ships have a similar control layout, although not every ship handles the same.
Some basics to understand.
A steam powered blimp is fantastical, period. A boiler, water and fuel is just too heavy. There is a reason why a blimp’s balloon is like 50x the cabin area. So, of course, there are some assumptions we have to make and some reality we have to ignore, and move on. The boilers function without having to attend to the fuel or water, and the fuel and water is always perfect.
Simply, the boilers produce steam pressure which drive the three systems we are most interested in: engines, buoyance and guns. Just with that basic system some basic rules become obvious. One such rule would be: if all the available steam pressure produced by the boiler is consumed by a single system, then there is no remaining steam left to power the other two systems. Likewise, if demand for all systems is 100% of available steam pressure, the available steam pressure for each system would be the total pressure available divided by the three systems, aka 33%-ish.
The cannons are driven by steam, not black-powder. Each cannon must charge with steam pressure before the cannon can be expected to propel a cannonball at the enemy. The more guns charging at once, the slower they charge. The more steam supplied to the gun system, the faster they will recharge as a whole. In other words, one cannon will charge faster than 12 cannons at the same time.