Some tests you can either have an X-Ray or a bend test, your choice. Some welders prefer the bend test, some prefer the X-ray. Both can be nerve racking waiting for the results. If you want to get into TIG pipe welding, you need to be able to do it equally well with both hands in tight spaces. Then you'll find out it it's not so easy. If it still is, try it with a mirror or sticking the filler rod through the pipe from the backside. LoL
You shouldn't have any trouble signing on as an apprentice! Just need to do it soon while everything you learned is still fresh in your head.