Heyhey,
sorry I am one day late with this! I totally forgot it was friday somehow, possibly because I had to work today:)
so I started with my well tested blouse pattern (I used it for this and this)
I copied the top part of the sleeve onto another paper, the length I wanted the sleeve of the dress to be plus hem allowance
I also copied the shoulder part and drew a line at the shoulder markings
then I copied the back-part and added the shoulder part right away too
marked the middle of the shoulder
and connected that to one dart (add seam allowance at the shoulder)
now I cut that line down to the hem, if you have a second dart like me, cut it in as well, and at the waist
then I glued that to the part and you have 2 back parts
now did pretty much the same to the front
the new bodice parts, I used a stretchy fabric, if you dont, you need to add seam allowances at the new seams
next I copied those new bodice parts onto another paper
and drew the seam line longer, as long from the waist down as I wanted the skirt to be and also made it wider towards the hem to give it a nice flared skirt
did the same with the other parts
at the side-seams I also made it wider towards the hem
just at centre front and back it stayed a straight line
I didn’t change the collar and collar stand
I hope this was helpful for you, if there are any questions left please do not hesitate to ask!
keep sewing and smiling
your TailorFairy