To reduce practice time and make it effective, listen to the MP3 sound file for your song while reading the sheet music (lots of times).
Using an app, you can also slow the tempo down and play along. Here are the ones I have experience using. They will require you to download the song into your phone or computer and open it with the app.
1=C major … 2=A minor
3=F major … 4=D minor
5=G major … 6=E minor
7=Bb major … 8=G minor
9=D major … 10=B minor
11=Eb major … 12=C minor
13=A major … 14=F# minor
15=Ab major … 16=F minor
17=E major … 18=C# minor
19=Db major … 20=Bb minor
21=B major … 22=G# minor
23=Gb major … 24=Eb minor
25=F# major … 26=D# minor
27=Cb major … 28=Ab minor
29=C# major … 30=A# minor
