Very nice job for the first holster and you can't go wrong with a pocket holster.
Now wrap your gun in plastic wrap and then wet mold the holster by dunking in hot tap water for 5 seconds, wipe off the excess water, put the gun wrapped up and lightly form the holster to the gun for about 10-15 minutes of setup and then pull the gun and let it dry. This also might remove the dots of pen color and of course you can dye it next and/or top coat it with Resolene cut 50/50 or Tandy Satin sheen.
Keep up the good work and look forward to seeing the finished product and how it works for you.
A cross draw is very ambitious but give it a whirl. Suggestion is start with a pancake design and many designs on paper before cutting leather. Lastly ask questions and we can help.