When should i do my placements?

Hey everyone! Last season i went 3-7 in my placements, and landed in silver. I'm hoping to do better, but i don't know if i should do them now, or wait till im better. I play jungle, and jungle. I can also do top lane , but i am not very good at it. I can also play support . I'm not very confident, but i don't know when i should do my placements. Please help!