I advise for beginners crocheters use paper liners with the measurements of your waist and submit the crochet tissue on it, as crocheting work.
The paper should be smooth and white or brown paper. This procedure will find it easier, you just have to measure each contour well so clothes stay perfect.
Thereby it is verified that everything goes well without unraveling and re-weave to catch up.
You can also click with pushpins the mold at a wooden table so it will not move to measure the garment.
This tip will help us to weave easier and faster!