I find that a good tension helps with even stitches. How do you "string up" your yarn on your hand...? maybe wrap around your pinky once more?
I weave between pinky and ring finger, ring finger and middle finger, middle finger to index finger to hold up the yarn. Sometimes twice around the index finger. The less tension I have the more I have to pay attention to even stitches.
A lot you can still fix by plucking at the stitches with the tip of a needle after finishing.
And: by practice most people - but not all - get more even.