Where do I meet trans people offline?
Repeat spaces beat one-off events, and neither of them is an app.
Apps are one channel and they are the worst one for this particular goal, because the trans-labelled apps mostly admit everyone and the general apps are not organised around it. Offline, the density is better than you would guess.
Look for repeating things, not events
A monthly meetup, a weekly game night, a choir, a climbing session, a book group, a football team. Something with the same people each time.
This matters more than the specific activity. You cannot get to know anyone at a one-off event with four hundred people in it. You can get to know everyone at a group of twelve that meets every fortnight, and by the third time you will know who is who.
Where to actually look
Your local LGBT centre, if there is one, and its noticeboard. University LGBT societies, many of which run open events for people who are not students. Queer sports clubs, which have grown a lot and are usually explicitly trans-inclusive.
Trans-specific support and social groups — the social ones, not just the support ones. Local mutual aid and community organising, which is full of trans people and has the advantage of being about something other than dating.
Independent bookshops, gig venues and cafes that run queer nights. Pride, but the small local one rather than the enormous corporate one, and preferably by volunteering rather than attending.
If you live somewhere small
This is genuinely harder and there is no point pretending otherwise. The nearest city with a scene may be an hour away, and going once a month is more effective than going nowhere.
Online communities that are tied to a place — a regional Discord, a local group — are the realistic bridge. They convert to offline meetings more often than general online spaces do.
How to be someone people talk to
Turn up more than once. Almost everyone gives up after one visit, when the second and third are where anything actually happens.
Do a job. Help set up, run the door, make the tea. It gives you a reason to be talking to people and removes the problem of standing alone holding a drink.
And treat it as making friends rather than shopping. Dating comes out of the friendships far more often than out of the introductions, and people can tell the difference immediately.
Safety, briefly
Check what a group is before you go — most publish their guidelines. Tell someone where you are for a first visit. If a space feels wrong when you arrive, you are allowed to leave without a reason.