First, Welcome to HW. I hope you will share your Journey with us, maybe in a signature with the relevant details?
AS to when to try, the standard answer is "What did your Dr. tell you?
In my case, I tried and accomplished an orgasm at the 4 week mark, and was cleared to resume full intercourse at 6 weeks. It varies by doctor and patient here. Some did a few days after catheter removal, some waited 8 weeks or more.