Fill every spare container I have with water, charge my power packs and then wait a couple of weeks in my flat.
Like... let's think about this here...
- How would an unarmed human being with impaired mental faculties and coordination break through a locked door? Answer: They couldn't. What are they gonna do, hit it with their fists? Good luck with that. Can't break the window, I'm not on the first floor. They can't fly.
- How long do you think a corpse could keep walking around before rigor mortis kicked in, or lack of circulation caused all the blood to pool in their legs, or all their muscle fibers rotted to the point they couldn't move any more? Their eyes would rot first, so they'd all be blind within a week or two. Like... a living human just stops functioning after a mere two days without water. Human bodies are delicate things with many systems that all need to be working in order to do things like perceive the world around us, react to it, move around etc. If the heart isn't supplying blood and oxygen, and micro-tears in muscles aren't healing, and the brain isn't firing off signals... a human body is just a bunch of useless meat, really. A core characteristic of zombies is impaired mental ability... which removes one of the main advantages a human has over most other animals (that and our ability to throw things, which zombies also seem to lack?) facing zombies is like facing a mob of creatures with all the weaknesses of a human and one of the strengths.
- How on earth would the army, who have riot shields and assault rifles and APCs not win against a mob of unarmed, blind humans who can't coordinate or use weapons or anything? They always have the army lose in movies, but like... how? In what scenario in history has a disorganised mob with no weapons, regardless of numbers, EVER won against people who have like... even just spears and a basic shield wall? It makes no sense. What are zombies gonna do against flamethrowers? Or helicopters with rotor-cannons and stuff? Hell, what would zombies even do against one of those high-pressure water hose guns some countries use for crowd control?
So I'd just lock the door and sit it out. Read some manga, play some D&D... They'd all rot and get rekt by the Army in like a week and then it'd all be fine.
If I absolutely had to go out, I'd put on a leather jacket and gloves, thick boots and jeans and make myself some sort of rudimentary shield and a spear or maul... and a helmet of course, and something to protect my eyes from splatter, sunglasses would do. The armour doesn't need to be incredibly thick or made of a strong material, because it only needs to resist a human bite; zombies don't have weapons (honestly motorcycle gear would be amazing, but just a few layers of fabric stuck together with PVA glue would work; a gambeson was a core piece of armour for centuries because of this. Even a sword struggles to cut through several layers of linen, never mind a human bite!). A bow or sling might be nice, but it'd be harder to have the stuff for that lying around. Travel only during daylight, always walk right down the middle of the road, so nothing can jump out. So long as you have distance, a Zombie isn't going to catch you, because you think and move faster.Travelling in a group is best.
...But going outside is a bad idea because the army might think you're a zombie and shoot you. Better to stay in lockdown.