I playing am a Shifter (Wildhunt), Druid (Circle of the Shepherd) with a Gruul Anarch background. I am not sure how many Proficiencies I should have. Please help me get the right number.

When you enter your rage, you can choose one weapon that you are holding and infuse it with one of the following damage types: acid, cold, fire, thunder, or lightning. While you wield the infused weapon during your rage, the weapon’s damage type changes to the chosen type, it deals an extra 1d6 ...