Partial answer
First Step
Write out the pangram associated to the picture.
THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG.
Second step
Remove any letter that appears for a second time or more.
THEQUICKBROWNFXJMPSVLAZYDG
Third step
Associate each letter in the above sequence to the corresponding letter of the alphabet that appears in that position to create a substitution cipher, so $$T \rightarrow A, H \rightarrow B, E \rightarrow C, Q \rightarrow D,\ldots $$
Fourth step
Use this cipher to decrypt the faded text in the image
Htsbe slhsvbvlvbxf, ixp hucbffups? Itv ektfeu
becomes
Basic substitution, for beginners? Fat chance
At this point, given the message, I may have hit a red herring but it might start others in the right direction.
My guess is that
We must decrypt the same text but using a different cipher.