I study writing English.English writing.

"English writing" functions as a noun here. You don't really put two conjugated verbs next to each other in English. And "study" is usually followed by a goal.

bBut I don't study speaking English.English speaking.

Make sure to capitalize each letter at the start of a sentence.

I want to knowlearn a way to learn to speaking English.

WBy what means do you learn to speaking English?

bBut I don't study speaking English.

I want to know a way to learn speaking.

I studyam learning how to write ing English.

but I don't study speakingam not practicing my spoken English.

I want to know wayhow to learn speakingspeak English.

What means do you learnHow do you practice speaking?

How tTo sSpeak English

Proper capitalization in your title.

I study writing EnglishEnglish writing.

Word order: "English writing" is the natural phrase

bBut I don't study English speaking English.

Capitalize "But" at the start of the sentence.
Word order "English speaking" is the natural phrase.

In my opinion, Sspeaking is more difficult than writing and reading.

No need to capitalize "Speaking" unless it starts a sentence.

I want to know a way to learn to speaking.

Add the article "a" to make the sentence grammatically correct.
"speak" Correct verb form.

What meanthods do you use to learn speaking?

"Means" is understandable but unnatural here, "methods" fits better.
Also, "do you use" is the correct phrasing.

I am studying how to writinge English.

To me, the use of regular present tense ("I study") feels more like a general fact. Both make sense here, but I think a present progressive ("I am studying") sounds more natural. Native speakers often use present progressive instead of regular present tense in this way.

"(As a student of English...) I study how to write English."
"(Right now...) I am studying how to write English."

bBut I don't study'm not studying how to speaking English.

You could replace "English" with "it" since it has been mentioned before: "But I'm not studying how to speak it."

In my opinion, Sspeaking is more difficult than writing and reading.

I want to know a way to learn to speaking.

What meansHow do you learn to speaking?

As a native speaker, I learned to speak English from being constantly surrounded by it. To communicate with people and to understand the confusing world around me, I had to learn it deeply as a young child. That's... well, that's the experience with all native speakers of a language, really.

Unfortunately, I don't have a lot of good resources for learning how to *speak* the language. And English pronunciation can be very difficult, and is full of irregularities (for example, the word "colonel" is pronounced like "kernul", and "vague" like "vayg"). Many of our words come from different languages, and these words often kept their original pronunciations.

Anyway, recording and listening to yourself speaking can be helpful. There's also online services where you can practice with language tutors such as iTalki and PolyTripper, though some of those may be paid services. Listening to English podcasts or YouTube videos can be helpful as well.

I study writing in English.

I want to know ways to learn speaking.

What means do you use to learn speaking?

How do you learn how to speak?