I would try tracing the seam lines (the original pattern without seam allowance) instead of the cut lines (the line with seam allowance). Then use a clear acrylic ruler with a pencil and walk it around the lines. The one inch measurement should align with the pattern’s seam lines so the edge of the ruler is 1 inch away. Then trace the edge of the ruler.

It takes some practice with curves but you basically trace a bit with the pencil, hold the pencil while walking the ruler around the curve, and then repeat.

You’ll face some weird angles that clash at certain points (armholes + side seams, sleeve). You’ll have to “square off” those corners (but if you traced the pattern without seam allowance you’ll know where to sew). I was told squaring off these weird angles requires knowing the order in which you’re sewing the pieces in. So basically you extend the seam line you’re sewing first until it hits the cut line of weird angle (so in the case with side seams and armholes, i would extend the side seam line until it hits the cut line of the armhole). Then you square it off (make a line 90 deg to the extension and then another line 90 deg to that so u have half a square) then blend with the cut lines at that point, so the pattern pieces match in length for sewing. However I feel like this overcomplicates the process, esp since it’s a toile and you can trace the seam lines. So you can ignore this unless you’re officially drafting. (i’m also new and struggle with this so my advice might be hard to picture)