After you get 5 posts under your belt, you can start a new thread.
Some posts are locked because the information might have been unappropriate, unsafe etc. If you read through the threads that are locked, you should be able to get the jist of why they were locked.
The wait period between posts is indeed to keep the spammers at bay.
Both of yall have 10 posts now so you should be able to start a new thread to ask your questions in. :thumbsup