Help alleviate my anxiety - engine was noisy on startup

Dont lose sleep. all lifters lose their prime in 10 seconds or less per Johnson lifter white papers. Thats what hydros do, they lose their prime at shutdown under a cam lobe and then open for oil pressure once they get on the heal of a lobe. It takes a few seconds for oil pressure to build and fill the waiting lifters and take up the slack built into hydraulic lifters. Once the oil pressure has allowed the lifter to fill and take up the lash, the lifter has now become a solid lifter and is quiet. A ticking lifter after 30 seconds is something to investigate, most likely a dirty check ball seat.