Here's a list of ideas for your zero waste / sustainable journey. I hope this helps! As a preface:
The most environmentally friendly thing you can do is to use what you already have; don't re-buy everything or throw something out because it doesn't align with your zero waste ethos. If it's harmful for your health, that's an exception.
Shop secondhand first. There's no need to buy all of this new. Allow yourself to gradually transition.
Everything listed is vegan. It isn't listed per item since that would be repetitive.
Keep in mind the 5 Rs, as coined by Bea Johnson: "Refuse what you do not need, Reduce what you do need, Reuse what you consume, Recycle what you cannot Refuse, Reduce or Reuse, and Rot (Compost) the rest."
Air fresheners are packaged in plastic and contain toxic artificial fragrances.
Make a room spray using essential oils and water. Be sure to carefully dilute the essential oils; you just need a few drops. Store in a spray bottle. You can repurpose a used one.
Consider composting to divert organic matter from the landfill, where it will have difficulty decomposing and will release methane, a greenhouse gas. If you have curbside compost pickup, that's great! Otherwise, if you have a yard you can start a backyard compost. And if you have an apartment, you can start a worm bin (not that a lot but not all food scraps can go in a worm bin—look it up to keep your worm babies happy).
Do a trash audit and note what you're throwing away. This will help you prioritize what waste you'd like to minimize. (link to waste audit)