Yay! I'm glad you had a good first time out, and it's great that you've written up the experience!

As with so many things, practice makes perfect with climbing: not only will you get more comfortable with things like letting go of the wall (ALWAYS kind of terrifying the first few times!), but as you watch other climbers and also pay attention to the way your own body is moving, you'll develop both muscles and technique. You sound like you're off to a fabulous start, and I hope you continue to enjoy it!