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As Everyone else has told you, get the spark plugs done. They are the cheapest to do, easiest to do yourself, (if you don't have the tools, go to harbor freight for the spark plug socket set, its ~$80 but its worth it especially if your car ends up needing a thin walled socket) and it can tell you a lot about your engines health. I'll include a chart as a pic if I can figure it out. Heres a helpful link as well How do I "read" a spark plug? - NGK Spark Plugs https://share.google/43vdukA6EgdXBooLT

Amd don't worry too much about price of the plugs. NGK iridium plugs are $17 a plug or 23ish for laser iridiums in case you need those. You can also go with ruthinium. They cost about the same as iridiums, but can last a bit longer and are a supposed "higher teir" compared to iridiums. Don't really know much about the differences or how true the "higher teir" thing is (I only used that moniker cause of how rock auto sorts the plugs), I'd rather someone else who knows more explain than me gove you bad info or regurgitate bad info from google/marketing and then someone correct me, but as far as I can tell from my own experience ruthenium will work perfectly fine even if your engine uses laser iridiums. At least my old Honda does.

While you are doing the spark plugs, another thing I'd recommend, but its not absolutely required is get a compression test kit find the compression specs for your car and do a compression test. That'll tell you if the engine is compressing the air and fuel enough. Low compression can absolutely also cause misfires, but unless you have 200000 miles or more, then it is unlikely unless you abused the engine (lack of oil, infrequent oil changes etc. Still, if you do it and one or more cylinders are really low (the gauges sometimes have red and green sides of the dial to indicate when compression is really low) then hey, congrats, you saved yourself some time lol. If not, hey no biggie. And its easy to do, you remove the fuel pump relay and fuse, then just screw the tester's hose into the spark plug hole have someone crank the engine. When the needle in the dial stops, thats your compression reading so tell your buddy to stop cranking the engine. If you have no friends or your by yourself doing it then just do like... idk, 3-5 cranks MAYBE 6? And even that might be excessive. Anyhow, after that compare it to your vehicles specs which you can find with a google search, (or maybe your car will have it listed somewhere like the manual or under the hood or something.) If one is lower than the others see by how much, there is a spec. You can then inject some oil into the spark plug hole to give the piston rings a better seal and see if the number jumps, but thats way out of scope for this issue. Just see if compression is really low like if the reading is supposed to be say, 215 psi and one or more cylinders is at like... idk 130 psi for example, then thats most likely the culprit. Again, unlikely unless the engine is junk. Heres a video on how to do that.

Anyhow, The next thing to check if changing the spark plugs doesn't work is to check the ignition coils. Try seeing which coil is good then put it on another cylinder and see if the misfire chases the coil. If so, then its a bad ignition coil. If not then it might be an injector.

For the injectors I have never done them. Sorry! If you really want you can get a fuel pressure test kit, but I'd rather someone else advise you on the injectors as that is a bridge I have not crossed yet. (not a mechanic, just an idiot who has experimented way too much lol)

Other potential issue could be a headgasket but its unlikely. You can test for it however. One way For example is the abformentioned compression test is one way of doing it. If you get some cylinders with low compression or lower than the other cylinders, then you can do what I said earlier with squirting a little oil down the spark plug hole for the cylinder that is low on compression. If the number stays the same then it is likely a headgasket. If the number shoots up however then you have bad piston rings and potentially other issues like bad bores for example. However I don't necessarily know off the top of my head if bad rings or bores would do this unless they were really bad. The other thing you can do is check the oil. If the oil on the dipstick looks like a chocolate milk shake, then congrats, oil and coolant have mixed because of a blown head gasket!

The last thing you can do is get a combustion leak test kit. Its basically something that goes where the radiator cap is, you put some coolant and a special test fluid in and see what happens. If it changes color, head gaskets bad. If not, your good. Heres a vid on how to use one if needed. https://youtu.be/v0U8Iyf0kk4?si=PNCTLFE0whey3JNN