How to sew wth patterns.

For a first time sewing project select an easy pattern with a small number of pattern pieces. Read the pattern envelope to help select the appropriate fabric and notions needed for the sewing project. Buy the correct size by having a friend measure you first. Don't buy the size you get ready-made clothing in. Pattern sizing is very different.
Open the envelope and read the directions. Find each pattern piece that you will need to use and cut it out. Pin the pieces together using 5/8" seam allowance. You will have 1/2 of the garment. Have a friend check the fit and help you make any needed alterations in size or length.
Read the pattern user guide (sheet) to determine the sewing patterns layout on the fabric. Be sure you understand the grainline of your fabric--this is the same as the direction of the selvage edges. Also check your fabric print to see if any images will be upside down.
Layout the patterns according to the user guide.
Pin the pattern pieces to the fabric following the user guide.
Use a pair of scissors specifically earmarked for cutting out paper sewing patterns. Keep another pair of 8" long scissors specifically earmarked for cutting out fabric. Sewing patterns tend to dull scissors and sharp scissors are needed to easily cut fabric. Cut the fabric using the pattern pieces as a guide.
Mark the patterns using tailors chalk or a tracing wheel and tracing paper. You can also make tape labels for the back of each pattern piece so you won't get confused when you start to sew and don't know what you are looking at.