It’s done! I will take better pictures soon hopefully ^^

I started out making the body according to the pattern. I guess my hook-size is too small, because it didn’t fit around my arms. I added a couple more rows of shells (for a grand total of 26 rows) and then even 2 more sc rows.

I decided to make a custom pattern when starting with the sleeves. I wanted them to be tight around the arms, so I made the sleeves like this:
1: Attach yarn and chain two, divide 13 shells along the armhole and finish with a slip stitch in the two chained stitches.
2: 2 ch / 6 shells / 1 dc / 6 shells / ss (12 shells)
3: 2 ch / 6 shells / 1 dc / 5 shells / ss (11 shells)
4: 2 ch / 5 shells / 1 dc / 5 shells / ss (10 shells)
5: 2 ch / 10 shells / ss (10 shells)
6: 2 ch / 5 shells / 1 dc / 4 shells / ss (9 shells)
7-20: 2 ch / 9 shells / ss (9 shells)
21: 2 ch / 4 shells/ 1 dc, ch, 1dc / 4 shells / ss (8 shells)
22: 2 ch / 4 shells/ 1 dc / 4 shells / ss (8 shells)
23-28: 2ch / 8 shells / ss (8 shells)
29: 2 ch / 3 shells / 2 dc / 2 dc / 3 shells / ss (6 shells)
30-38: 2 ch / 7 shells / ss (7 shells)
39-40: ch and sc all around followed by a ss (37 stitches)

There are three methods of decreasing in there that I experimented with:

1. Replacing a shell with a dc and skipping it the next round. This creates a big decrease.
2. Replacing a shell with a dc-ch-dc and 1 dc in the next round, then skipping it in the third round. A smoother decrease.
3. Replacing two shells with 2 dc-ch-dc and putting a shell in the middle in the next round. Another smoother decrease.

For the collar I added 4 rows of shells around the border and finished up with 2 rounds of sc all around similar to the sleeves.