The easiest way would probably be to join a recruiter clack group (e.g. https://weirdlyhub.com/peoplepeople-slack-community-recruiters-hr/) and reach out to people there.
You could also do a search on LinkedIn for: 'recruiter', and if you have a particular geographic area you want to focus on just include that in the search too.
Reaching out to the people you find on those platforms can be done in a couple different ways, and the best one will depend on what it is you're trying to communicate or ask. If you'd like more specific advice relevant to your particular product or service, feel free to send along further information,
There are several resources which you may find helpful in your search to start a tech career:
1.) LinkedIn- I'm sure you heard this before, but by incorporating key search words into your profile will help recruiters zero-in on you. No experience? That is OK. In your summary mention that your goal is to be an "xx" or "yy". Of course, these titles are job search key words.
2.) Create a profile on AngelList. AngelList gives you great insight on new start up opportunities in your area.
3.) Attend meetups, cohorts, or free events at code schools in your area. Most of these events there are on site staff, or recruiters there actively searching new hires. Also, the majority of these events are held inside of top tech companies, it's a great way to get inside and stalk the company you love!
4.) As far as HR is concerned, you're looking in the wrong place! Most tech hiring decision come from that specific department or department head. Find them! HR is usually the last step in the process.
As a previous HR Manager of a tech company, the easiest way to reach people like myself is utilize social media. One of the most heavily populated sites is LinkedIn. It shouldn't be too hard as long as you have a list of "must haves" together.