@shazzbaa You are super smart! I am subbing to your comic and adding you on Twitter. Nice to meet you 
@PorcheJ most people have already said what I would've, but I do have a couple tidbits I learned:
In a screenwriting class I took, on the very first day, our professor made us do an exercise that I found SO helpful. She didn't explain what she was doing, she just led us through the steps one at a time. I suggest you grab a piece of paper and follow along with me without reading ahead if you wanted to do it too.
STEP 1! Write down your three favorite movies.
STEP 2! think about each of those movies, one at a time. REALLY think about them. What's their log line? If you distill the story down to its base theme, what is it? WHY is this your favorite movie? Write all of this down, let your mind wander. You want to take your emotional love for something, and turn it into words that you can grasp onto. Take your time on this step.
STEP 3! You now have a bunch of writing, probably for three pretty different movies. The last step is, "What do they all three have in common?" This was such a hard question for me to answer. I had an action adventure, a Disney movie, and a dark romantic drama on my list. They had NOTHING in common. It took me most of the class session to figure it out, but when I did it was a lightbulb moment. They all had the theme of family, not related by blood, taking care of one another. That's my subconscious want in a story. And then, knowing this about yourself, make sure that's in your story. You'll draw in the people who feel the same way as you.
Another thing she told me, is after you've written the script and characters, write down your character's traits. There should be at least two positive traits, and 1 negative one. (or vice versi, for bad guys) You DON'T want to simplify them down into just those traits, but go over the finished script and make sure you have moments that illustrate those traits you wrote down. Your character is selfish? Give them a moment where they can be selfish. Don't just rely on how real they feel in your head, readers need to see things played out.
HAVE SOMEONE ELSE READ YOUR SCRIPT WHEN IT'S FINISHED. Some things will be SO clear in your head, until someone else reads it and goes, "I have no idea what's happening in this scene here."
And FINALLY (sorry, this got really long
) don't be so hard on yourself. We're all learning. Trust that you're doing the best you can and that you'll get better as you go. I really want my comic Kindred Skies to be this beautiful, perfect epic, but it won't. It's my first comic and I have no idea what I'm doing. So enjoy the process, and see where it takes you. Let yourself be discouraged sometimes, but always believe yourself, and don't put yourself down in front of others. If you don't believe in yourself, how do you expect others to, you know?