The four most helpful pieces of advice I have are unfortunately all obvious:
lay a lot of games against players who are at least slightly above your level.
nderstand the core tactics used by players; one way to do this is to look at the games played on those ladders by top players/teams.
ead a strategy guide or two - https://nghood.com/warlight/strategyguide
is the gold standard.
evisit and analyze your games, especially watching for surprising or decisive moves.
Good luck. The team ladders do have a reputation for being easier than the 1v1/Seasonal/Multi-Day ladders due to low participation, so it might be a gentler learning curve.
Edited 3/2/2021 17:35:58