Lyx-template creation (starting from an existing LaTex-template) for a doctoral dissertation

In order to conclude my doctoral dissertation swiftly, I am looking for a freelancer that could help me with the following: 1) Creation of Lyx-template based on an existing university LaTex-template. This LaTex-template defines -among other things- the layout of the first page and the font types. Furthermore, support of separate files for each chapter, inclusion of graphics and an index are required. 2) The template should be working both with Lyx 2.3.6.2 under OSX 12.1 as well as with Lyx over RollApp. 3) Moreover, I expect to need help with some tables and graphics, for which I would like to hire the same freelancer that has also set up the template. Knowledge of German would be an advantage, however not a pre-requisite.