WSM or UDS are great choices for a newbie. A PBC is as well but with the PBC you lose the learning curve of actually tending a fire.
IMHO a PBC is a good "next step" smoker because the way it is designed and operates, it forces you to learn to let go of the pit probe and constant temp checking and to focus on just letting the meat cook. It takes you back to just throwing meat over fire and letting it cook. Learn fire management and maintaining good temps with a UDS or WSM first, and then add a PBC for those days that you just want to throw the meat on and sit and drink beer.
18.5" OTS, 22.5" OTG, CB Silver(Rip), Vintage Coleman Bullet, Pit Barrel, UDS