Put the clicker on and adjust it so it very rarely goes too soon. By too soon, I mean it goes before you are on aim and steady-ish.... not having the sight passing through the gold.If it takes ages to click, move the clicker away from you a little at a time till the aim lasts about two seconds.
Your new shot sequence will be largely unchanged. You will draw and settle on the aim as before, but now you will stay on aim( as well as you can) for a second or two till the clicker goes. Because you are already on aim when it clicks, it seems that "click" sound releases the string. To make the clicker go "click" is a movement of the draw shoulder blade, not a pushing forwards of the bow arm.
To begin with do a lot of shooting at close range 10y or less. You do not want any worries about missing the boss.
There are three DO NOT's worth mentioning. DO NOT worry about the sight wobbling, get the shot away. DO NOT think about when the clicker is going to go, keep moving the shoulder blade round. DO NOT think about the release, let the click get the shot to go.
I tell archers who first use a clicker that it is like using an alarm clock. You set it and forget it; you don't stay awake all night checking that it goes off at the right time in the morning. Set the clicker and get on with what you must do. What you must do, isn't to sleep, but to know you are drawing further. If you don't draw, it doesn't click. Again, like the alarm clock, if you don't wind it up or have working batteries in it, it won't go off, ever.
The shot sequence will last a little longer. That isn't something to worry about. That extra time, is there to help you. It demonstrates that you are working to your new plan. View that extra time as a step forwards to better form.