Caffeine is not exlusively bad or good based on neurotype. Yes, type 2B’s and type 3’s generally have more issues with caffeine because they have less inhibitory neurotransmitters, produce more cortisol/adrenaline and have less COMT (enzyme responsible for adrenaline breakdown). That doesn’t mean they need to avoid it for the rest of their life.
It comes down to individualism and personal preference. If you feel good on one black tea and one cappuccino, then why stop? If you are very in tune with your body, you’ll know when you have crossed the line.
Try it as an experiment. Drink a cup of coffee every 45 mins (caffeine kicks in after 25) one hour and 30 minutes after you wake up and asses when you start to feel jittery, unfocused, get racing thoughts etc. When this occurs, you know you went to far and you can take the previous cup as your upper limit. Off course tolerance and anxiety will influence the amount of cups you can drink. If experimenting makes you anxious, don’t do it.
Generally speaking, 1-2 cups of black coffee (a 15-20 ml cup, not a 1l JAR) is fine. If you get jittery or anxious, drink less coffee, switch to decaf (still contains 15-30% caffeine btw) or drink green tea instead. You can even drink caffeine free coffee if you’re just drinking it for the taste.
The great underlying issue you need to look out for with caffeine (as wel as any other stimulant) is that it can mask fatigue. Be really careful when using stimulants long term and notice how you feel in the morning before you drink your cup of coffee. If your eyes are stuck together, your cognitive performance is really slow, your body parts feel heavy, drinking cofffee and go train is a big NO NO.