Thank you very much!But I want to ask some questions:1.is there every words in title needs to transform the first litter as capital(or should I say that every words should start with capital litter)?2.why I need to use "introducing"instead of "introduce"?3.When I use "with"to correct two words or sentenses.4.Preced means to be or go before something or someone in time or space,and is it like “Superior to”whats the different between them?
Finally,I cannnot express my inner gratitude(the feeling of being grateful)to you and I hope that you can answer my questions and correct my mistakes(Is there any other methods to say what I want to mean?).Thank you!

You're welcome! I'll try to answer your questions.

1. Does every word in a title need the first letter to be capitalized?

No, that would make it too easy. :D That's why I say there are rules for this. To explain it to you briefly, most "minor words" such as: and, the, in, is, are not capitalized (unless it is the very first word in the title - which must always be capitalized). All "non-minor" words would be capitalized. But there are a lot of exceptions, and it can actually depend on the style (ruleset) you follow. So I can't teach you this in a simple message, but I recommend you search for some guides on the subject.

2. Why do I need to say "introducing" instead of "introduce"?

"Introducing Myself" is the grammatically correct way to describe what you want to do here. "Introduce myself" is nonsensical because this would be the imperative form of the verb where you are giving a command - to say that you are telling yourself to introduce yourself. The way the imperative form would be used correctly would involve giving someone else the command. For example, a teacher can say to you, "introduce yourself to the class"

3. When do I use "with" to connect two words or sentences?

This is a word we use a lot, but at it's base it means "together." Here is a short guide that might help you. On the left is the word "with" can represent, an extra tip/prompt, and an example of it used in a sentence. This is something you will learn naturally as you continue your study, because it's used constantly in English

together - Who/what is together? - I’m with my friends.
using - What tool or thing do you use? - Write with a pen.
manner - How does it happen / what feeling? - Speak with confidence.
condition - What is happening at the same time? - With the rain stopping, we went outside.

4. Precede means to be or go before something or someone in time or space - is it like "Superior to”? What's the different between them?

That is the correct definition for "precede."

"Superior to" is not the same. It means "on top" of something else. This can mean a few things; it can mean in a physical sense (your head is superior to your neck), or in a non-physical sense (your boss has a superior rank to you), or "better" in the sense of greatness (Michael Jordan is a superior athlete to LeBron James).

- Finally, I cannot express my inner gratitude (the feeling of being grateful) to you and I hope that you can answer my questions and correct my mistakes (are there any other methods to say what I want to mean?)

I'm happy to help! What you wrote here is understandable. Here's how I would write the same sentiment myself, if you want to see something else similar: "I can't tell you how grateful I am for your help, and I hope you'll be able to answer these questions and continue to correct my mistakes in the future."

Cheers!

Is too kind of you,nefare!That's a very lucid explanation!I cannot express my inner grate in short words!I wantto send you a Chinese phrase to praise you:赠人玫瑰，手有余香。You will returned from your kindess and patient one day!Hoping you have a perfect day!

You are very welcome! Thank you for your kind words :)