Your knowledge of Swift will continue to grow with practice. Take the time to begin a project; make something new. If you do not have a project available or in mind, visit developer.apple.com. This website provides a good overview of the resources available to Mac and iOS developers and also provides some examples that may inspire your creativity.
Another recommendation is to find Meetup groups for Mac and iOS development in your area. Most major cities have such groups, and they host regular talks. Going to these meetings will help you learn, practice, and get to know your peers.
So, come join us. We’re out here making things, and we would love to see what you can create.