Executive Dysfunction Stack Help

Some important info: I have ADHD and depression but don't take stims or antidepressants. I take 20mg propranolol up to 3 or 4 times daily and have 10mg of diazepam as needed for really bad anxiety. I don't take it too often.

I want to try a stack with SAM-e. Tyrosine, and NAC. From what I understand these synergize well with each other and could be really helpful for ADHD management. I have taken NAC before a few years ago and remember it clearing the clutter in my mind a bit.

Would 400mg SAM-e, 1000mg NAC, and 500mg Tyrosine be good starting doses for this? Which should I start first or are they safe enough to start at the same time?