Jogler, having a pee is a very complicated process that we probably take for granted. Your urinating will be different to before. Your sphincter has almost certainly been removed along with your prostate and you now have to rely on your lower sphincter , pelvic muscles and your bladder neck. Add to that your nerves and urethra etc have all been bashed about, there will be bits of scabs and debris in there that have to settle down and come out, internal stitches have to dissolve.
Now the catheter is out you can resume your pelvic floor exercises. Remember to tense those muscles as you stand. Try to extend the amount of time between visits to the toilet. Some guys use a urine bottle at night to try and minimise the amount of disturbed sleep.
We all recover at different speeds, stay positive, tomorrow could always be the day you are dry.
Thanks Chris