What exactly do you mean " the process" ? Are you asking about glue on heads or screw in heads ?
If glue on, I get the point taper as even as I can to begin and then heat up hot melt glue. I myself like the lower temperature melt glue sticks. I heat up the glue stick and put a fair amount onto the point taper, making sure to rub it over most of the surface, hen I insert the taper into the broadhead. I usually mark the shaft with a dot which identifies what "up" is for the arrow as it is on the bow. I also align my heads so that they sit horizontally as you are aiming.
I then heat the ferrule of the head slightly and then push the point into the edge of my workbench, twisting or spinning the arrow to distribute the glue and seat it fully. Glue squeezes put, don't worry.
I immediately spin the arrow and watch for broadhead wobble. I do this by simply positioning the arrow vertically onto a hard surface and.. spin the arrow.
If there is no discernible wobble ( watch the nock / arrow interface) then set it aside to cool and harden / set. If there is I try to move the head in a direction that takes away the wobble. Once in a while I have to do it all over again cause that head is just difficult. Make sure you use enough glue.
If it is a screw in head it is much easier, kinda. Screw it into the adaptor... To align the head vertically etc. screw in a heavy field tip, heat the tip ( so the heat distribution melts the glue on the insert) and remove the insert. Cool. Then screw the broadhead back onto the insert, apply glue and push into the shaft, aligning it as you wish. Generally ( not always) it is much straighter from the start this way just because of fit.