I am trying to figure out how to dose my GHK-CU

I am trying to figure out how to dose my GHK-CU. So rn I have one vial with 100mg of GHK. If I add 2 mL of Bac water to it, then per 0.01 mL i am gonna have 0.5 mg, which is a dose that I want to start with. However, it's gonna be pretty hard to measure that out, so I am thinking to dilute the solution more. 1. First option, I was thinking to pull out 1mL of reconstituted GHK back into the 10mL bac water vial, where i pulled the 2 mL of BAC for GHK, and then use that vial for my injections. 2. Second option, pull out 1 mL of reconstituted GHK (100mg dissolved in 2 mL) and dump it, then add another 1 mL of Bac, let it dissolve, pull out 1mL of GHK and dump it again, then add another 1mL of Bac, and I should have a 22.5 mg of GHK dissolved in 2 mL. So then 0.044 mL will have 0.5 mg of GHK, which is measurable.