Start with any venue at any level offering you a 15 minutes slot for a 5-6 slides presentation or a 2-3 pages case study. Be it a peers meetup, a local open day, a virtual conference. Treat any opening as a nudge to get out of your shell, wrap up your work and speak about it with different people. You will find your best path and your best convenience realtively soon.
Meetups are pretty informal and usually eager for talks & speakers. There's not a high bar.
Conferences (depending on the conference) feel a bit like a bigger deal, and I'll commit to them if I feel I can have a bit more polish.
Some conferences/meetups also have shorter time slots if you don't want to commit to the classic 45 minute talk.