Does card draw on beginning phase occur before holding?

According to the game's turn structure and official FAQ rulings, Holding (the act of scoring battlefields) occurs during the Scoring Step of the Beginning Phase, while the standard turn Draw occurs during the Draw Phase, which comes after the Beginning Phase.

If you are referring to specific card effects that draw cards "at the start of the Beginning Phase," those resolve before the Holding step.

Sequence of the Beginning Phase and Draw Phase:

1. Beginning Phase starts (Rule 315.2)
   • "At the start of" effects: Any triggered abilities that specify "At the start of the Beginning Phase" (e.g., Loose Cannon) are added to the chain and resolve first.
   • Scoring Step (Holding): The turn player then holds all battlefields they control (Rule 315.2.b).
2. Channel Phase (Rule 315.3)
3. Draw Phase (Rule 315.4)
   • Turn Draw: The turn player draws 1 card as the standard turn draw (Rule 315.4.b).

Important Note: As established in RiftJudge FAQ #7628, "at the start of beginning phase" effects fully resolve before moving to the scoring (holding) step. Furthermore, the Holding action itself is part of the Beginning Phase, whereas your primary turn draw happens later in the Draw Phase.