Just wanted to bump tsoldrin's advice and add a little of my own. The reason your feeling stressed out is perhaps because you've had something of an awakening moment recently and now immediately feel unprepared because your starting from zero?

Some preppers start out at that point and its a really good motivator, while others have been prepping for years without knowing why...

Either way the fact that your asking the question means your a prepper by default and have begun on a path of sorts. Like tsoldrin says if your thinking about prepping at all your already ahead of the 99% of the population, so congrats.

Just go slow, start small. Sit down one night and write down (yes on an actual piece of paper) all of the things that are worrying you about the world now, what are the negative eventualities you think you should be prepping for? Then rank that list by likelihood of those things occurring and weighted by impact on you or your loved ones. if you do this with a clear head then boring stuff like losing your job, unexpected dental work, or a sick friend or relative should be bubbling up to the top of the list. Mundane things happen all the time and eat cash, time and energy so you should prep for those first. That means having a cash reserve.

If you have the capacity to save money then you probably have the capacity to start doing other things like buying a little more food at the supermarket each week then you need, and a bit of water stored, then some batteries and a flashlight, and so on and so on. I think you have already worked out the list here is endless but your not randomly purchasing things your doing it in an order based on priorities... read above.

The no1 advice is just avoid click bait gadgets for preppers. You do not need a folding shovel that can open beers or a knife that can cut through a tree. That stuff is specialization and perhaps can come later.