The trick to getting a chicken to like being caught is to let them catch you. They are a prey animal and when we try to catch them and pick them up (before they are accustomed to it) they see us as a predator - natural outcome, they try to get away and panic when you do catch them.
Instead of worrying about being able to catch them and hold them, become familiar to them. Go out, sit down and read a book - outloud - this makes you part of the scenery, keeps you from being focused on them with an unintentional deathstare and makes your voice familiar. Scatter some treats near you and relax. They will become curious, they will come close, they may even jump onto you -- if your goal is to tame them and you are okay with them being bold like that in approaching you, DO NOT MOVE and definitely DO NOT reach for, grab, etc. Let them hop on, hop off - let them move closer or farther away. Before long you are no longer a predator.