By the way I hope you’re not trying to play the chanter and all the drones together while you’re trying to learn how to operate the bag and bellows.
It increases the squealing noises and other distractions, at a time when your practice should have one purpose only: mastering blowing the pipes dead-even.
The best thing to do at the very beginning is to remove the chanter, and put a cork in the chanter stock. This eliminates the powerful temptation to noodle on the chanter, wasting your practice time by dividing your attention and efforts.
And shut off two of the three drones, leaving only one going. This eliminates the temptation to noodle with the drones rather than focusing on the blowing.
I should have mentioned this from the get-go, but my brain was in Uilleann Land where the beginner has a set with the chanter only.
In Scottish Land (bellows or mouth blown either one) the beginner should start with one Tenor drone only.
Then when that one drone can be sounded dead-even for a couple minutes straight it’s time to open up a second drone. If your smallpipes have the Bass/Tenor/Tenor setup open up the 2nd Tenor.
If your set has the Bass/Baritone/Tenor setup open up the Bass.
Now with two drones going, since you’re blowing dead-even (since you haven’t been noodling on the chanter) you can experiment with tuning two drones together.
Then when two drones are going for a few minutes dead-even perfectly in tune (no beats) it’s time to open the 3rd drone. Tuning three drones together is much harder than two.
Now once you can play all three drones dead-even for as long as you want, no dips or spikes in pressure, the drones perfectly in tune the whole time (no beats) it’s time to start playing the chanter. For pressure reasons you might want to stop off all the drones at this point, so you can focus on playing long notes on the chanter with dead-even blowing.
Then go once more through the process of bringing in the drones one at a time.
For sure you can just try to do everything all at once, but the regimen given above uses practice time most efficiently, and makes sure that you can master one task before tackling others.