It depends on what type of syringes you are using, some are easier/harder than others to get consistent. Start with getting a consistent 0.25 units, then work on getting a dose about 1/2 of that.
To test consistency, first draw the dose. Then turn the plunger (not squeeze) so that a drop comes out. Try to get consistent size drops, and count how many in your dose. Try to get first 0.25 unit, then 0.1 unit doses with consistent numbers of drops.