Borderlands 2, when to play which DLC?

Have recently downloaded the Handsome collection on my xbox one down and play now for about 3 days Borderlands 2.

Now my character has reached level 15 and it begs me to wonder when is the best time to start the DLC's? Also, it would be important to know if the main stats (and side missions in the main game) are leveling or if I'm not overlevelting the main stutter after completing a DLC. This was the case with BL1. After completing the Dr.Ned's DLC, my character was just five or six levels above the hauptstorry (which did not change in the rest of the game), making the game just not demanding and rather boring.

The problem with overleveln you have synonymous in BL2, the game is so designed that it works without the DLCs, ergo you have with bonuscontent then just too much.

to answer the question concretely, the big DLCs so Tinas Assault, Hammerlock and Crater you can play after the main story.

the "small" DLCs so something like the Moxxi Wedding-thing's in the normal mode on ca lvl 15 created.