The most important thing is to remain calm. Look into breathing techniques. Be conscious about your anxiety and suppress it until the hearing is finished. Write things down and and read them before you go into the hearing. Request a screen.
A few days before the hearing go through everything, play scenarios in your head, think of questions you could be asked and your answers. I googled a lot to find out how the enemy lawyers behave in court and what to do. Take a friend with you. The worst time for me was when it finished. I regularly broke down. The court where the hearings started, provided me with support during the waiting time for the hearings. That was a blessing. In the other courts I never got support. It is worth asking if there are volunteers who could support you. They can go to the hearing with you and sit somewhere where you can see them. That helps a lot.
The prosecutor will speak to you before the hearing. If you have any evidence you can give it to them or tell them or showm them.
After the hearing, go somewhere nice. Do not go home straight away. Meat with a friend, go to the cinema, distract yourself
I hope this helps. I tried to be as general as possible in order not to break any rules. I hope this is ok.