I'm having a problem with armholes shaping and neck shaping

hi… I’m new to knitting and I’m having trouble with some instruction. I’m going to share the instruction that I’m confused about.

Shape armholes: Cast off 3 sts beg of next 2 rows.
72 sts. Dec 1 st at each end of needle on next
3 rows, then every
following alt row to 54 sts.
Cont even until armhole
measures 8"

Neck shaping: Next row: (RS).
K 18 sts. Turn.
Leave rem sts on a spare needle.
Dec 1 st at neck edge on next
2 rows, then every following alt
row to 12 sts.
Cont even until Front measures
same length as Back to beg of
shoulder, ending with a purl row.
Cast off.
With RS facing, miss next 18 sts. Join yarn to rem
sts and knit to end of row. Work as
given for left side.

English is not my main language hope you can explain it to make it easy to understand…

Would you like someone to write out all the words that have been shortened? Or would you like it to be more a simplified version?

Shape armholes: Cast off 3 stitches beginning of next 2 rows. You now have 72 sts. Decrease 1 stitch at each end of needle on next 3 rows, then every following alternate row to 54 stitches.
Continue even until armhole
measures 8"

Neck shaping: Next row: (RightSide).
K 18 sts. Turn.
Leave remaining stitches on a spare needle.
Decrease 1 stitch at neck edge on next
2 rows, then every following alternate
row to 12 sts.
Continue even until Front measures
same length as Back to beginning of
shoulder, ending with a purl row.
Cast off.
With RightSide facing, miss next 18 stitches. Join yarn to remaining
stitches and knit to end of row. Work as
given for left side.

Welcome to KH and to knitting!
For the shape armholes, call the cast off row, row 1. Cast off 3 sts on row 1 then decrease one stitch at each end of rows 2,3 and 4. Decrease on the following rows 6,8,10,12, etc until you get to 54sts. Continue even (no decreases) until 8 inches. Two sts are decreased on each decrease row.

For the neck, you’re to work one shoulder first. Knit 18 then turn as you would at the end of a row. Ignore the remaining sts for now. Decrease one stitch at the neck edge on rows 1 and 2 then on rows 4,6,8 and 10.

so the total stitches that I have decrease is 54 stiches? or 54 stiches is remaining on the needle after the decrease?

You want to end with 54 sts remaining on the needle after the decrease.

thank you for helping me… this is really helpful for me :blush: