[QUOTE="Mr.Micronwould start off at about 1 drop paint to 6 drops reducer.
Part two reducer , Since you are just starting out here is the home brew recipe . I will base this one a 8 ounce bottle , 2 ounces of alcohol ( I use ethyl alcohol 200 proof ) 6 ounces water and 1 drop of glycerin per ounce so in this case 8 drops .
The alcohol helps with drying and reduction and works with the water, The Glycerin is to help with tip dry .
There is no end all cure for tip dry due to when you have air moving paint the paint will dry . Makes no difference if it is water base or urethane .
But at 60% off on the paint it is a great deal and will at least give you a starting point to learn from .