I generally prefer to take my time before making important decisions however poker doesn't always allow for it.
A lot of the more straightforward decisions should be streamlined once you've played poker for long enough, you should know which boards have a high c-bet frequency and which ones you should range check. Similar to once we get into push fold spots, those decisions shouldn't take too much processing power because we should have learnt them already and we're just recalling them from memory.
It just takes time, work on a new poker skill until it becomes second nature and you won't need to spend that much computing power to make a decision, saving your attention for more important and valuable spots.
Overall I would classify myself as a quick thinker, but part of that is being able to quickly recognize a decision will take more time. I think that's really important too.
GL
EDS