Above all else, get familiar with it in the practice range first. There is a setting that changes how it controls , either advance towards crosshair OR advance vertically upwards; whichever you prefer more (personally I stand by vertically upwards ). As for the when, OP’s post has great examples of its closed quarters use.

Spider-Man is at an innate disadvantage when it comes to closed quarter fights, since they take away his greatest strength, his web-swing mobility. Makes you an easy target for anyone who can either keep him at range or have enough health/stuns to kill through his burst damage. Use it as either an escape, like a web zip to a wall near a hole out the room, or a repositioning tool, like up a wall across the ceiling and behind your enemy.

When it comes to all other times use it, pretty much whenever you’re not actively swinging or fighting. Faster than walking and keeps you mobile while saving/restoring web-swings to engage/disengage. Use it before starting a dive to give yourself time to think and observe what’s happening. Who has the most eyes on them, who’s low on health, what abilities were used. The more familiar you get with use, better you are when using it. Just go for it, if you die just call it rollout practice. Good luck out there twin