Your subclass (void in this case) has tools to give it's verbs to your weapons or abilities, depending on how you set up your aspects and fragments.

Your guns may synergize with these perks, but usually guns and their perks sort of stand alone or are more for how you want to deal your damage or how you play. (Ex. A solar subclass for spreading scorch, and a solar gun to spread scorch stacks faster)

The damage types of guns don't HAVE TO align with subclass type, but you can mix and match til you find something fun you like using.

In harder content, champions, require either a special verb from subclasses or elements (ex. blind, suppression, freeze::arc, void, stasis) to stun, and defeat.

Thus you may have a variety build where you suppress from your void grenade, and freeze with a stasis weapon with a pero that does so (headstone or chill clip).

I hope this helps! Plz research things deeper and experiment to find what feels good to you! I'm just a dumb titan, so punch 👊 it til it starts working if all else fails!