can someone help me with piano chord progression? I'm confused I V vi vi IV vi V V I V vi vI vi vu V V IV IV I I ii ii V V I V vi vi IV V7 I?

Answer 1

The symbol(s) indicate the chord's starting note (root), I being the 1st note of the scale, II the 2nd, III the 3rd, IV the 4th, and so on.  Uppercase letters mean a major chord, lowercase mean a minor.  V7 means a dominant 7th chord.

Answer 2

What are you confused about?