Very relatable, are you me?
I've been doing coaching through Access to Work for ADHD, it's been extremely helpful.
My coach has given me a few things - firstly no question is a stupid question, also that often with ADHD the problem is lack of clarity (rather than me which is what I often assume!), so it's okay to ask for clarity.
In regards to subtlety I completely get this, many times I will translate or infer what they meant (which is quite a lot of mental work and also can be wrong as I've had a negative mindset on my ADHD- I catastrophise!) but it's better to take feedback neutrally. Later on you may reflect what could I have done differently or how could that have gone better.
Other times I'm so busy and absorbed in detail I will miss the nuance- I've started to tell people that I prefer them to be direct with me, please don't assume that I will know what you want or mean if you have not explicitly said it.
A really helpful thing for me I have also found is to try and maintain an awareness of my body - if I'm starting to feel a high level of anxiety or brain fog (aka increasing cortisol levels) there is usually a reason or something on the radar that I need to pay attention to.
Part of it can often be underestimating how long a task takes. I find I am most effective when I write down how I am going to do a task first and roughly allocate how long each step will be. That Is also helpful if I have to stop and come back to it as I know where I am.
I rely very heavily on note taking, everything gets written down in a way that I will hopefully understand later.
The other thing is sleep, this can hugely affect my brain. I think I self abuse with sleep because if I have lots of sleep my brain is too whizzy sometimes and I cannot sit still so I maybe subconsciously deprive myself! I find a standing desk very helpful for general alertness too. I also gain a lot from exercise / hydration / lifting weights but like everything consistency is key!
It's nice to hear someone else with the same issue as me.