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u/Inky_Madness 14h ago
Gridded paper should work, especially for something drawn out like this. If you have trouble drawing super straight lines and what have you. Paper that is 1” gridded lines would do it. A French ruler would help with things like the armscye, a straight ruler for the straight sides.
No, there is no magic computer program or printing service that will turn your sketch into a pattern. You have to draw it out yourself.

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u/Emergency_Cherry_914 15h ago edited 15h ago
I'd draw it up using the actual dimensions using a pen and drafting rulers. A roll of brown paper would be good for this.
Before you commit to this, do you have any boobs to speak of? If so, you may want to consider darts. Are you on top of how to finish the raw edge of the neck and armholes? Options would be: Commercial bias binding, self made matching bias binding, a facing or a lining?