1.47Your practice order
Do not attempt the whole version immediately.
Practice in this order:
1
melody only.
2
melody + bass.
3
melody + simple chords.
4
voice-leading/inversions.
5
extensions.
6
fills.
7
tag/ending.
8
intro.
9
full one-take performance.
This is much more efficient than trying to memorize the final arrangement as a block.