I own a 54 year old house in Los angeles and I want to convert my 1/2 bath to a 3/4 bath by adding an upright shower. The room is "L" shaped with a toilet at one end of the "L" and a sink at the other. The idea is to make the room square by demo'ing the closet that makes the room "L" shaped. I have very little experience but a lot of guts. I have a professional who will hang the drywall after I am done installing the shower. My biggest concern is tapping into the existing plumbing. My plumbing questions are: What supplies will I need? How difficult is this project? How do I do it?
Thank you,
Hopelessly Cheap

It best to contact Los angeles plumbing contractor
and ask to book an appointment for their service team, the best option and hopefully a quick repair.