The guidelines ask to use the original title https://news.ycombinator.com/newsguidelines.html There are some exceptions, when the title is a linkbait or not descriptive. Anyway, in general the dry titles are preferred here, people will complain otherwise.
You can edit the title of the post for a time after it was submitted. Probably 2 hours, but I'm not sure. The interval may change from time to time.
Another possibility is to write to the mods and ask them to change it, in case you made a horrible mistake. But this is not horrible.
Just remember to use the original title next time you post something.
(Note that if you are the author and use as the original title something like "Totally amazing program that will blow your mind!!!" and use the original title here, people <bold>will</bold> complain.)
It looks like you are the author of the blog post and/or the developer of the software. Next time add a small comment explaining that and offering to answer questions. It's not mandatory, but sometimes people is more friendly if the submitter is the author and replies the questions in the thread.