Stop counting rev’s and stop counting days is my advice.
Some unsolicited advice: Make sure you are relaxed before each attempt. Shake your arms out, roll your neck around a couple of times and take a couple of deep but relaxed breaths and then do your next try. You might be surprised how much tension you are letting build up.
Two things I have noticed with some beginners:
They tend to pedal too slow, or they don’t pedal smoothly. Keep those pedals moving and try to get your speed up a bit and balance will be easier.
The 2nd thing I’ve seen is that some people think that there is some magic balance spot you can sit in to ride (I call it ‘bike syndrome’). Nope, riding a uni is a more active thing. That’s why people say flail your arms, and twist.
But most of all, relax and have fun, and before you know it you will be.
As you move along in your riding you might like to move over to the: Beginners “today I” thread: The Beginners "Today I..." Thread
It’s a long running discussion where new. and some not so new, riders share their accomplishments no matter how big or small.