I have a question regarding sunnah prayers. How are they preformed? For example, maghrib you pray 3 fard do you then stand up straight away and pray the two rakat or are you meant to wait?
You do not need to perform the sunnah prayer immediately after the fard prayer. Each fard prayer can be followed by voluntary dhikr, and this is recommended to be performed before the sunnah prayer.
The most recommended form of dhikr is to say subhanAllah 33 times, alhamdulillah 33 times, and allahu akbar 33 times after every fard prayer.
As for supplication, it is recommended to be performed during the final sujood, and it can also be performed before the end of the prayer (before you say salam). One can also perform supplication after the prayer, although some modern Saudi scholars discourage lifting the hands up in supplication after the fard prayers, saying it is a bid`ah (”innovation”), while Ibn Baaz (a Saudi scholar) says it is permitted but not recommended. To be safe from criticism, it is best to not do this form of supplication until after the sunnah prayer.
It is recommended that you do not speak to anyone or do anything non-worship-related between the two prayers.