Baldur’s Gate 3 is recommended to be played 3 times to get all the achievements.
1. Play on Balanced difficulty and get as many achievements as possible. Pay special attention to the Jack-of-all-Trades achievement.
2. Play Dark Urge on Tactician difficulty to get all Dark Urge achievements, Critical Hit achievement and pick up any you missed on your first playthrough.
3. Play In Honour Mode to get Forehammer achievement.

Here is a comprehensive guide to getting all of the achievements.