If you have trichlor or dichlor, you can use it to get your CYA up; if you get the powder, use it to add Cl and the CYA will come up over time. quit using it once your CYA reaches 30-50, and use straight bleach after that for Cl...
if you don't have trichlor/dichlor already, I would get stabilizer/CYA and add direct, and just use bleach for Cl...
Remember what someone said about new gunite- drives pH up! so you may need acid to keep it in check
and later, you'll want to keep your CH up to prevent the gunite from leaching into pool over time...