Boredom and irritability aren't out of the ordinary in early sobriety. I had anger and rage as well. Lots of emotions surfacing and limited coping skills, for me, anyway. I struggled to process things for the very first time as a sober adult. I'd been drinking for about 15 years solid.
I think, on one hand, it's smart that you don't completely trust yourself not to drink. But... I do think you CAN trust yourself.
Learning to trust myself was such a critical part of my own recovery.
The way I approached it was to know for a fact it was absolutely possible for me to never pick up another drink again. I took comfort and assurance in that fact.
And so over time, I lived it out ... I did not pick up a drink in the varying faces of stress and how it presented itself to me. I did anything but drink. And that is how I learned to live sober. Confidence will come at that point. And it's not false confidence, and not a precarious confidence ... it will be strong confidence that you can indeed live well without drinking.