This shirt worked in Bora Bora yarn is a classical top down, with a simple construction including some technical details: it is in fact worked with short rows around the neckline, double make one increases on the yoke (raglan) and some lace stitches in rhombus shape in the bust and on the sleeves.
Anyway, a possible choice is to work the neck without short rows and divide the double make one inserting a stitch between the two increases (this stitches will be part of the front and the back and will be therefore included in the stitch count at the end of the yoke).
The basic scheme of lace rhombus can be reduced and adapted according to personal taste.

The yoke is worked in one piece and then divided in three pieces, if you work the bust first and then the sleeves. No seams are needed :)
Sample shown corresponds to a size M.

Always bear in mind that the knitting needles size is just a suggestion: everyone works with a different tension, so a knitted piece worked by two people, with equal yarn and stitches, could be very different in terms of tension and measurements.
I therefore recommend making a swatch, flat or round depending on how the knitting is made, in order to have more than 10 x 10 cm to measure. If necessary, knit some stitches/row in garter stitch to avoid curling work and be at an advantage in the measurement.
The swatch is knitted in a stockinette stitch or with a different stitch depending on the stitch that you intend to use in your work; once finished and removed from the iron, stretch the swatch (better still would be to make measurements after washing it) and measure the number of stitches and rows corresponding to 10 cm.

SIZE
XS (S) M (L) XL

FINISHED BUST CIRCUMFERENCE
43 (46) 49 (52) 55 cm

HEIGHT OF THE FINISHED SWEATER
43 (47) 51 (55) 59 cm

SUGGESTED YARN
BORA BORA by Lane Mondial (70% Egyptian Cotton, 30% Bamboo; 280 m / 100 g)

YARN REQUIREMENT
col. 930 g 300 (350) 400 (450) 500

SUGGESTED NEEDLES
Needles 3,5 and 4 mm with cables 40 and 60 cm long
(short and long point for circular needles)

GAUGE
Cm 10x10 = 24 stitches and 28 rows/rounds worked in Bora Bora in st.st. with 4 mm needles

TECHNIQUES
Tubular cast-on and cast off (worked flat)
2/2 ribs
Stockinette stitch
Rhombus lace pattern
Short rows (wrap&turn)
Magic loop
Right slanting increase (M1R)
Left slanting increase (M1L)