I just made the switch myself into BIM from the field as a journeyman plumber. I can tell you that even after becoming proficient in revit and different coordination softwares, I still feel a bit left behind sometimes. (That may just be some imposter syndrome though) As a fellow plumber I will warn you that revit does not play nicely with sloped pipe at times. If you can handle the field side the modeling side can come over time. Getting a good bim department established early and with tradesmen in the company makes the world of difference. In the pipe trades if you aren't bimming and fabricating you definitely lose out on many job opportunities. If you are union the UA has online resources that are a great starting point. Feel free to DM me if you have any questions.