Can you package handle while high?

I have been 100% sober at fedex doing package handling. The job is easy for me to get the hang of, however i am quite bored throughout the job. I live in a legal state and im wondering if a little toke is manageable before work. I dont smoke everyday so my tolerance isn’t great. If anyone has inout on this let me know, my performance has been rated excellent and i don’t want to kill that, but i’d like to be able to pass the time without using my adhd meds(i like to use them to study. I feel like maybe i need a little more time to get the process automated in my brain and/or be a stoner again so i am functioning normally while high(although i stopped smoking everyday bc it makes me more efficient in general.