They will not be autosexing, all the chicks will look alike and you will not be able to sex them until they get old enough to show secondary sex characteristics (comb, pointed hackle feathers, etc.)
If you want autosexing, you need both parents to have the correct genetics and RIR hens don't have that. Your fastest path to autosexing is to buy some pure Rhodebar pullets to go with your male.
Where are you located, perhaps someone reading this will be able to help. I know I could help if you were near me.