Birdies are perhaps the most misunderstood parts of golf. Most PGA Tour professionals only average about 3-4 birdies a round. Scratch golfers only average approximately 1-2 per round. The key to their success in shooting lower scores is not making more birdies; it’s avoiding bogeys or worse.
My advice is not to start any hole with a score in mind. Commit to making smart strategic decisions that are independent of one another. For example, if you’re playing for birdie or par, and perhaps you made a mistake off the tee, trying to make up for your mistake is likely going to lead to a double bogey. Or if you are thinking about where the pin is on a hole while you’re hitting your tee shot, and chase an angle off the tee that brings more trouble into play, you’re not giving yourself the best opportunity to post the lowest score on the hole (again, bogeys).
I know that’s easier said than done (I’m not perfect at it) - but excellent expectation management and strategy pay is addressing the shot in front of you and trying to make the most optimal decision. Worrying about your score, or what will happen on the next shot tends to create problems.