Well, the first step is to relax. Do you remember way back when you were in grade school and you learned your cursive and how beautifully written the old documents were? That's a hard act to follow! I'm not sure I've ever seen anyone be that exact! :) The trick is to find a pen that is comfortable in your hand. and feel it flowing ink onto the paper. Pencil works too! The media is your liquid thoughts of the "a." Try doing fluid ovals connected. Then stop. and try not to push too hard. Remember, your "a's" don't have to look like the "a" that I just typed! It nice to know you care enough to try! Really, everyone's handwriting as we get older changes. You are going to be O.K.! Some people just have a knack for it and you can be one of them too! Good for you! Relax and repeat!
To make your handwriting better, you will first have to practice writing from your arm and shoulder in the air or on a white board and also other people's handwriting for ideas. Practice writing the words and letters until you are comfortable find your own style and avoid writing on a PC, or other shortcuts. Use different types of writing material like wide tip pens, markers, colored pencils, felt tip pens, and even calligraphy pens and also try out different mediums.