As a returning player

Can someone give me a straight up example of how this whole subclass thing works now?



Let's say I am a Phantom Ranger at the moment



When I reach Awakening, will I be forced into Yul Ghost Sentinel or do I get a choice? For instance, can I go straight for Yul Trickster?



If I am forced into Yul Ghost Sentinel, am I allowed to sub Trickster then?



This whole new system is really confusing. Thank you for your help.