какая интересная грамматическая конструкция there is okay сами придумали?

My purest gratitude for reading this letter. //Strange sentence - I would not use “purest gratitude” Having considerable experience in the speaker’s area and being sufficiently successful as a communicative and empathic man, I drew attention for a part-time job at the call centre you are offering. //a part-time job you are offering at the call center drew my attention. Because of covid-19, as you may know, many lost their jobs, and labor market is used up all their offers. //and THE labor market has a job shortage. And I’m interested in this trade, as a breadwinner of my dearest. // get rid of “And” at the beginning of the sentence. The only part that matters for me is how long each shift and what its quantity? //“The only part that matters TO me is how long the shift is and the wage. (I’m not sure what you mean by “quantity” in this context. I think you mean “pay”. The question caused by pandemic that is existing now. //This sentence seems unnecessary and does not have a clear meaning. It’s sure, you abide by the FMLA law, thereby maintaining security of each worker. //I think you mean “I’m sure that you abide by FLMA law...” But, to be sure, I really need to know what conditions in the call centre are. //Use “However” instead of “but” when beginning a sentence. Is there a disinfection after each shift? If THE pandemic GAINS momentum, will cuts be provided to THE shift in terms of its quantity and duration? I would be very APPRECIATIVE IF YOU ANSWERED these significant concerns. If you excuse my little audacity when asking, when WILL I be needed to send an application and when WILL interviews be held? In advertisement are following that applications and interviews are being taken and held before 25, 30 of April respectively. ARE there any changes? Yours sincerely, //Just say “sincerely” - putting “yours” seems to personal for a potential employee to say. Alex //You should put your last name as well