Colour saturation in photos is very vibrant! The colour is more muted as in photo 5.
M1R before marker and M1L after marker instead of backloop increase….might use this one next time as I’ve used it before … https://youtu.be/-Eh-ieWIaM0 but have to remember it uses a stitch to make one ie: if it says knit 10 M1 you only knit 9 and Kfb into stitch 10.

Knitted 5 rows after increases to split

Used backloop cast on but not a fan. Next time I’ll use cable cast on. https://youtu.be/cmaIYuHHlt8

34 rows to bottom edge from underarm pick up.

Made a pigs ear out of pick up stitches under arm which is why I will use different cast on next time.

Use this next time https://youtu.be/euTp37dlhlM

Found this helpful for finishing cuff https://youtu.be/TFY4R9N16hY

Picked up 138 around edge and collar 58 on each side and 30 across casted on stitched across shoulders and back.

Made button holes on left for a boy working upwards on 5th row. K3 (make 3 stitch one row button hole K4) repeat () 4 times.
https://youtu.be/qwpewmHUeaM or maybe https://youtu.be/H5HfJhb2ddo
Last button hole slightly higher than recommended on pattern.

Used German short rows instead of w&t. https://youtu.be/i_6Pjl20zKA

Cast off using https://youtu.be/u-Fy4GkpjPg