Usually, in HN, don't make a small comment about your own submission. Reply to the questions in the threads, but try not to write a new comment. (Sometime it's a good idea to make a comment.)
Both projects you have submitted look like things that a good antivirus should detect and block. Do you have a project that is less controversial?
You submitted two projects in one day. If your plan was to continue submitting two projects each day, then I think it's too much. If your plan was to submit only one project per week, then I think it's ok.
I prefer an blog post about some interesting detail or technical problem of you project than a direct link to github. Both projects have a good readme.md, but a long blog post is usually better to get attention here. (But not too ling.)
I actually could not understand how to showcase a project. So the the first submission was a mistake. I could not delete it either. So I experimentally posted another.
Thank you a lot for visiting my projects. Your advice was really helpful.
But what should be the first step to build up a community? How to let others know that there is a tool that can be helpful for them?
The pit that many open source projects fall into is looking for people to do work rather than looking for people who need help.