I suppose you refer to perform a go around after a NPA when being visual and thus having disconnected the AP+FD's and having the bird as ref on PFD.
In that case, and depending on your FMGS version, the FD bars will eventually automatically pop up. (if not "give me the bars" and pnf pushes HDG/VS-TRK/FPA p/b to give you the bars)
In any case TOGA + target BA 15° all engines + flaps 1 step up.
read modes , Modes are : MAN TOGA/SRS/GA TRK/A THR blue. Pos clb : gear up
The speed is automatically set to managed even if it was selected.
Speed target magenta is actual speed at toga selection or vapp whichever is highest.
At thrud red : LVR CLB flashes on fma : sel THR CLB / you get A thr white.
At accel alti : OP CLB engages+ALT blue : target speeds jumps to green dot spd.
Retract flaps : >F : 1 , >S , 0
or if speed restriction : use speed selected/keep flaps as required 1 or 2.
If any vertical mode engages and even before the programmed accel altitude, this either automatically or selected by yrself (OP CLB, VS, ALT*, ALT...) then LVR CLB will flash, target speed will jump to green dot : same thing : select thr clb, athr will engage, retract fl on sched.
Spd restrictions/alt restrictions during GA will not be followed by the system even if showed in F-PLN : your job !
Given the high ROC you'll get on 2#, and given the fact that most 1st GA altitudes are rather "low" : you'll end up most of the time in ALT* quite soon. Ref to previous paragraph.
Enjoy !