Presuming you already know what it is that you want to achieve, you should start by putting it into words. In short and clear terms.

What do you want? Why do you want it? How can it be achieved?

Write it down. Be succinct. Try to limit yourself to one page only. (You can attach additional information, but the main document should always be short.)

Identify the reason why the present state is bad: Where is it founded – in which law, regulation or practice?

What kind of change do you seek?

Will this change affect groups other than literary translators? In which way?

What will be the financial impact of the change you seek? This is important. If you wish to influence politicians, you must do their work for them. Getting someone to help you estimating the cost of your proposal, would be a great help.