It would be a question for the future.
Yes, although they already did a lot of their investing in their colonial possessions before the game.
While they seem strong and unaffected, intelligence reports suggest that the Sketch have cut themselves to the bone preventing revolution. They are running lean and desperate for wealth and luxuries that their workers and middle class can keep occupied with. Right now their biggest fault line is their economy. Another major shock is something they can't "shrug off like last time, although given their exploitative practices economic disruptions have to hit them early in the process lest they seize upon another's weakness to turn enough of a profit to come out ahead in the crash. Also, while you scare them the recent thawing of relations with the Hes doesn't sit well with many.
Both are really good at putting down local rebellions. They are untested against peers but should put up at least a decent fight with significant numbers. You need massive naval investments to fight them.
You getting involved in the fighting is unlikely to start right away, but both groups expect you to pick a side for diplomatic purposes if nothing else.
Espionage actions.