Well done. Here is a possible rewordings of your notebook entry.
Help me, please
I have joined this site not to learn a language but rather to teach one. I am an English teacher from Guayaquil, Ecuador, and I have been teaching English for about ten years. I work in a high school in my city, but I have got a couple of hours a day availabe to teach online. Please let me know if you are interested. Thank you.
Best regards,
[Better not to say 'if I stand any chance' because it makes you sound desperate and lacking in confidence. Instead, you should present yourself as a competent teacher who is available to teach students if they are interested in learning English.
I think it sounds better to say "I have" (tengo) rather than "I have got" which is more informal or colloquial.]