For song interpretation of any kind the particular signs you choose need to match the meaning and intent of the lyrics. You may be using particular standard signs to capture this meaning or you may be using the ASL classifier system which creates predicate phrases using certain handshapes and movements that represent "subjects/topics" actions or states of being within the predicate of the sentence.
It is very likely that many predicate phrases in song lyrics will use the classifier system rather than standard signs. As an example "I'll rise up" would need to be interpreted for what the actually meaning is in the song. So it might be interpreted as "BECOME STRONG" (two standard signs). Or it might be interpreted as FIGHT (a standard sign) or by lifting one's whole body up into a strong stance ending in the sign like "making muscles in your biceps" (this would be what is called a whole body classifier). You are literally using your whole body to express a meaning in a gesture-like way.
The general point of this is that the particular way to express "rise up" can't really be determined without knowing the context and meaning being expressed in the song lyric. And it may be interpreted in different ways within a particular song as the implied meaning of the phrase may change as the song progresses. Finally, songs are artistic and just as license may be taken in spoken/sung renditions of the song signers who interpret song lyrics take artistic license in their ASL interpretations of songs.
Hope this helps.
