In this video tutorial, you can find a simple part with many holes. What is new in this part? You can find how to create a Sketch over a plane, and how to use pad to extrude a closed profile until this are in contact with the next surfaces. Keep it in mind the order of operations. It is very important to have a order in your mind when you create a part. It is essential to make a part with less possible operations, to save time and also money when you create the part and also in production.
See below the execution drawing for part No. 005.