Go to bars that play techno / house. Meet people. Add bars and people on Instagram. Add djs from bars on instagram. Ask for recommendations for other places. It took me about a year to break into the underground. Most important part is to meet people at events. Be a fun person, non-needy

https://www.goabase.net/ can be a good starting point to finding events. Facebook/Whatsapp/Telegram groups (focused on music) found from your local subreddit can probably point you in some direction too. Once you've attended one or two events and gotten to known some people, they'll happily help you attend more ones, including the ones that are not advertised as publicly.