That's right. Older models remain FDs OFF and the procedure is different than the normal FD ON ga procedure.
RA-alive
I understand you have FDs OFF, therefore there are no vertical nor lateral modes in the FMA. Before the go around, there is only the A/THR in SPEED mode, if it is active.
Upon advancing thrust levers to TOGA A/THR is armed (except if initiated below 100 ft RA in which case you have to arm manually).
You have to ignore the flashing LVR CLB prompt at accel alt. Otherwise ATHR will come active in SPEED mode with VAPP as target, which is not good.
Keep TOGA, accelerate, set target speed (green dot or 250 or whatever), levers to CLB, then if you want to use automation turn FDs ON,then select apropriate modes.
Take a look at your FCOM 4 flight phase related