FIX protocoll and order type support / coaching

Hello, I am searching an expert in the field of knowledge of FIX (Financial Information eXchange). I need support and coaching how to implement in an existing trading application. Further I need support and coaching concerning the different order types, I would like to do this job via teamviewer. A working FIX protocol generator already exists in the trading system. I ask you to explain this to me. Moreover, I want to modify/ add some order types to that. The goal of this support/coaching is that I know how the FIX protocol generator works and that I know for example real life cases . Example: how I can change an existing market order to a limit order GTC Do you have experience with FIX (Financial Information eXchange)? Did you already create / modify an fix protocoll generator? Do you know how to change market order type to limit order with good till cancel? Do you know how to automaticcaly a cancel order/request after 300 milliseconds?