Welcome to IndieTalk's Screenwriting forum. It's fine not to share immediately. A good way to start is to read some of the threads and see if you have particular questions. When you do have a question and want to share, you might want to pull out only small parts of your script to get advice. If you are share please paste your script in between [ CODE] ... [/ CODE] tags.
The other way is to use Google Docs to share a PDF version of your script. Just be sure that it's set for public viewing.