Hi,
There are more details are required to recommend specifically, like heigh, present weight, dietary habits, biochemical parameters etc. To reduce weight you need to follow a well balanced weight reduction diet, which contains more fruits, green leafy and other vegetables and complex carbohydrates. You should follow a proper meal timing. Oats is good as it contains complex carbohydrates, but alone oats can't help you to reduce weight. You should do some exercises which will help you to burn fat, thus this weight reduction process will be faster and with that good cholesterol level will hike.
Next Steps
You can chat directly with me on practo for further discussion.
Health Tips
You can go for small quantity frequent meal which will helpful to reduce weight.