What device are you using? This could affect apperance

Trackpad or mouse?

That's your first problem FA was made to be compatible for handheld devices. Try using a mouse, getting a drawing tablet, or using your iPad/phone

Try using a handheld device or buying a drawing tablet then, or you could practice on the touchpad and get more skilled overtime

Keep drawing on the trackpad. Your fingers will subconsciously grow to understand it, therefore getting more skilled Practice takes time tho

wow those are some encouraging words