What are the first steps you would take during an apocalypse that collapses the infrastructure as we know of?

Depends on the apocalypse:

Zombies/Solar-grid collapse:

Build a defense on my house, fill all the containers I have with water, pour all my alcohol into one giant tub so I can fill the bottles with water and save the alcohol as a cleanser if things go south. Charge my devices, move all my solar stuff upstairs so I can charge them with the upstairs window that I’ll also use for sniping and defense. Grab my hunting rifle, put on my riot gear and just defend my house until I run out of supplies and have to eventually leave.

Nuke:

Same beginning steps, but I’ll move everything down stairs to a room without windows instead of up, put on my gas mask and riot gear but add my gloves and P.T.E gear under it, as well as a duster (the desert trench coat).