waw. I want to make an 8266 esp02s remote.(what I have) I have all the hardware around

he is using esp12s (as long as i solder io 14 and 4) no difference right?
is there anything I have to change before flashing, like make ssid, subnet and so to match my router?
is this the best source??
https://github.com/tylpk1216/KoboPag...tAP_No_OTA.ino
what should I use to flash. and should it be totally erased for any boot?? noob to this flashing stof.