Usually "space battle" posts want to achieve some particular fantasy aim (like, realistic where fighters still exists), or they are focused on aliens and whatnot.
I am instead trying to figure out how space battles work when it is humans vs humans, sometimes even having friends on the other side, people DON'T want to wipe out the other side (but still want to win).
The goal of the battles, after breaking through enemy lines ("spheres, planes" ? since this is space...) is to land troops on the enemy planet and take it. (why not throw asteroids in it? Well, because you want the planet intact, including you want to live in it. Also people will object to you being a genocidal commander mass murdering your own species)
So far what I came up with:
Opening salvo with lasers, then you stop using these to avoid charged capacitors getting hit and exploding.
Then both sides do burns to approach each other while dodging kinetic projectiles, smaller lasers might be used (ones without big capacitors), missiles (with solid warheads, not explosives) too.
Eventually the fleets will be near each other enough that dodging kinetic projectiles is hard without splattering your crew with the acceleration, thus both sides start firing their cannons.
Then people might attempt boarding, to kill enemy commanders and keep their ships.
EDIT: Just to clarify, you can kill people on other side or even destroy a few ships, you just don't want every battle to turn into a complete bloodbath with one side 100% dead and the other side 95% dead.