How you do it is basically meaningless, what matters is that you're in control of the car, that's all that matters from a test perspective.
Best practice is generally considered to be find the bite with the handbrake on, release it, then set off. Why? Well, each foot is only doing one job and your hand is working the brake, so it's probably easier, especially for hill starts. If you roll back you'll catch it quicker with the handbrake rather than having to switch your foot back to the brake pedal, which could be the difference between passing or failing your test.
What do I do? Well, firstly, I think what I, or many people do, is going to be moot. Many of us will have that experience with our car and don't need to find the biting point, we just have it locked in muscle memory and get straight to it, thus what works for us may not work well for a new driver. Particularly, if, like myself, they drive a diesel which generally tends to be much more forgiving when it comes to the clutch, which is why you might see people warn learners about driving instructors who teach you to initially set off using just the clutch. It works in a diesel. In that small poxy 1.0L petrol thing you'll likely get as a first car? It'll be a struggle at best and it'll most likely just throw a fit and stall.
But my method is some variation of coming off the brake while raising the clutch to bite... I think? Idk... I've been driving for almost 7 years now, all 7 years in the same car too. It's not exactly something I put much thought into, it just happens.