LinkedIn applications, applying to every PM role available in my metro area that I could, attending as many tech & startup events as I could. I got to know the main writer of the local startup/tech news aggregator pretty well and would pester him regularly for contacts at new local companies that he's talking with. I was active in my city's tech Slack/Discord community.

I do have a degree albeit on not in STEM. Also have an advanced degree (also not STEM) that helped the company I was with from 2018 until 2021.