What’s wrong with particles

Hi, I have some problems with particles. Actually, I'm an intermidiate student but still miss up with the particles. Not all of them of course.
Can someone explain or maybe link a page about all usages of those particles? ni vs de, wa vs ga, o, and e.
I've watched alot of videos explaining those particles but still I'm confused about them.

Linguistics is not an exact science; those questions do not have answers that work in all cases.

Think of it like in object orientated programming:
the particle tells what should be done with the word standing in front of it, so it is like a method for a class in software-development.
by the way: there are books which only are about particles. here is a good one:
https://de.scribd.com/document/7159952/A-Dictionary-of-Japanese-Partic...

See also,
https://en.wikipedia.org/wiki/Japanese_particles

But you should post here if still wondering.
http://www.japan-guide.com/forum/quereadisplay.html?0+158230

Both particles may have the same meaning, but there are also cases of different meanings.
It is surprising that deciding it is a matter of before and after,
so it is not easy to get lost as to which is the best.
Please see a lot of example sentences.

In conversation many cases are omitted unnecessary words, so it is a tone to decide it.
This is the same in every language.

Thank you everyone for the fast reply.
I'm a bit good at omitting particles in casual speech. I'll check them all thank you