How to correctly write a sentence? The only thing unchangeable in this world, is the volatility women, all the rest is subject to change constant. Whether it is correctly?

Can I ask for help in verification the message? Please check whether the following message is correct written. "Dear Mr..., Thank you for your response. I agree that a meeting would be beneficial; however, first I would like to settle some questions, which will allow me to make a decision on cooperation. I previously forwarded a series if questions in an e-mail to which we are still awaiting a response. To decide with the cooperation, it is pertinent that we receive answers to those questions at your earliest convenience. I hope you understand my motivations. P.s. sorry about the typos in previous messages. Yours sincerely,"

My words. Przymiotniki - Adjectives niezbędny - essential nielegalny - illegal ponury - gloomy Rzeczowniki - Noun kolej - railway przedsiębiorca - enterpreneur prognoza - forecast rentowności (l.m.) - yelds Czasowniki - Werbs. kształtuje - shapes, kształtowanie - shaping Przyimki - Prepositions pomimo - despite

Please verification my content. I must send message to company. Please verification my content. Dear Mr. ... When I can expect an answer to my questions? I hope that the offer of cooperation on Your side (www) is a serious proposition. Your sincerely,

This is my first sentence :) I am interested learning english, looking for good teacher, because I want to good speak in business english. My native speaker is polish and very good speak not only everyday language, but also bussiness, economy and legal, I'm sorry, my english is very bad, because i am autodidact My proposition is language exchange on Skype - I speak to You english, You speak to me polish :) I invite You to contact me, greetings.