Jeremiah stood before God to pray for his people (Jer. 18:20)
Peter knelt to pray (Acts 9:40)
Nehemiah sat down when he prayed (Neh. 1:4)
Abraham prostrated himself while praying (Gen. 17:3)
Ezekiel prayed in a loud voice (Ezek. 11:13)
Hannah prayed silently to the Lord (1 Sam. 1:13)
Paul prayed and sang in the spirit (1 Cor. 14:15)
David prayed in the morning (Ps. 5:3)
Isaac prayed out in his field in the evening (Gen. 24:63)
Daniel prayed in his house three times a day (Dan. 6:10)
Anna prayed night and day in the temple (Luke 2:37)
What does this prove?
Just that there are lots of ways to pray.
So, pray!