most Singhs will say follow your panj.
However there is a loophole which was done once by Master Tara Singh and 4 other Singhs on another Singh who took pahul from AKJ early last century, I need to find it. The only issue is AKJ are also going to give you naam dhrir which teaches to do Waheguru simran in a way which is annoying to myself and other traditional sikhs, and makes for very controversial keertan videos on youtube tiktok!
Why not practice rehit first and then take pahul from panj you are comfortable with? There is no point in taking pahul from a panj if you are already aware of them? That is why I waited as well as I do not follow sgpc!
I thought Singh Sabha was guaranteed SGPC Rehat. AKJ and Damdami Taksal Rehat are fully wrong imo. Ang 1,289 of SGGS Ji's Saroop are my source.
What if i take Amrit at an AKJ Sanchaar but just start following Buddha Dal Rehat or SGPC insted? Is that fine or am I stuck with whatever the Panj say on the day?