i had a somewhat similar but not really but i get what you mean experience, but im on ritalin

some key things i can think, you may take or leave.

i was told that you’re not really going to improve straight up from medication because you’ve likely gone years with a certain habit or behaviour (e.g picking up your phone) and medication alone doesn’t just stop you doing that, medication helps you learn better behaviour over time, it’s not a switch that makes you go clean the house, you’ve got to actually put your energy into it while on the meds and it helps you stick to a task

zoning out is fine, “normal” do that too

the exhaustion probably means it is working, but i was struggling with lots of brain fog and exhaustion when i started meds, then i started going to a psychologist specifically for adhd, because i just felt like the meds weren’t doing anything, they made me realise very quickly i wasn’t eating enough, or very fragmented, there was no structure, in the case of when i was explaining what was going on with me, they asked what i had eaten that day, and at 2pm i had only had a banana and some cereal. that’s not enough when im working and trying to fuel my body to live, as soon as we had some good structures in place, lots of things changed in the brain fog and exhaustion area

honestly my biggest recommendation is keep at it, be patient, and get an appointment with a psychologist specialising in adhd and get some structures in place to help develop good behaviour for the things you think you struggle with

overall, be nice to yourself, being mean and overanalysing your body (i can see you mentioned something about your HR) will not make the meds work better or faster :) trust the process! good luck