How to learn/train other maps than Arabia?

We recently started playing team games with my mates mostly 2v2 or 3v3, (we're about 900 elo on 1v1 rm individually) and every time the map it's not Arabia or similar open map we get destroyed. In Arabia we win 70% of the times but with the pool changing we often get maps that we have no clue how to play. We don't wanna exclusively play Arabia so we would like to train a bit but playing against AI is not great as it doesn't play the meta for each map. Are there any team game tips for specific maps or a way to improve and train? Any suggestions welcome thanks!