Start with structured case-practice communities, school consulting clubs, alumni groups and other candidates on a similar timeline.

A good partner does not need to be an expert, but they should be reliable, willing to give feedback and able to run cases consistently.

Rotate partners occasionally so you do not overfit to one person's style or favorite case types.

Keep a simple log of who you practiced with and what each session exposed as the next weakness to fix. For more detail, see the first-round consulting interview guide.

imo My math was fine from the PhD, but business judgment took longer than I expected.

This was one of those things where speaking to a recent candidate gave me much better context than generic recruiting advice.