At 5' 7" and a 29" inseam I can relate to your problem....
Practice in low speed balance maneuvering is absolutely the key to this. The need to practice and obtain confidence in your ability is most important.
Once you start to get the feeling that the bike is an extension of yourself rather than something you are perched on, that is when you will start to get confidence in your ability to keep the plot vertical.
Body strength comes in when despite ALL your practice, the bike does does take charge because your tired, or you get a bad footing, or whatever.... at some point you will still tip over.
THEN upper body strength allows you to lower the bike a little slower and prevent more serious damage. DAMHIK. Let's face it, unless your Arnie Shwarzenwotsit, the bike is still going down....
The technique you will find most beneficial has been mentioned, using only the rear brake at low speeds, if the bike is destabilized by using the front brake a tip-over becomes more likely.
When I move off I lift both feet immediately and don't put a foot down until I stop, that way I can use the rear brake right up to the point of being stopped.
I am better in my low speed turns to the right than the left, don't know why, maybe it's a function of the throttle usage at an arm stretch on full lock.
However I can do full lock right turns at the slowest speeds with intermittent stops without putting a foot down and maintain balance.
This does not come overnight, I have been riding for a lot of years and used to teach basic and intermediate riding skills back in the 80's.
I now mentor riders learning to take the advanced riding test.
Practice, Practice, Practice, Practice, Practice and when you have done that, practice some more.
Forward observation when slowing to look for possible problems which will cause you grief if you stop at a certain point.
Concentration on your ride and as I said, practice. KEEP YOUR HEAD UP and look where you want to go, not where you don't want to go....
Don't forget, leave that front brake alone when turning or moving real slow, just feather the rear, slip that clutch and keep some revs on, don't let it bog, if it stalls, you will be picking it up.....
HTH