Reserved a pickleball court, but when we showed up there were 40+ people playing drop in games there. How does the etiquette work for this?

My girlfriend and I are trying to get into pickleball, but we’ve never played before so we’re intimidated by the idea of just joining drop in games and having no idea what we’re doing, since we’d probably just annoy everyone else there. We had reserved a court at Gilman in Ballard yesterday afternoon, but when we got there, there was a ton of people that looked like they were rotating through games on all 4 courts. We also couldn’t figure out which court we had reserved, they don’t seem to be marked anywhere as far as we could tell.

We had reserved “Tennis Court 1” via the Amy Yee reservation portal, which it gave us as an option for pickleball, but when we got there we saw it was actually made of 2 pickeball courts. The Amy Yee portal says there’s two pickleball courts, Tennis Court 1 (which we reserved) and Tennis Court 2 (which it says is not reservable). So we’re not even sure which one we actually reserved, since we made a reservation for pickleball on a court that was actually 2 pickleball courts?

Anyway we both got intimidated by the whole thing and decided we’d rather eat the $15 we spent on reserving the court and leave. We had no idea which of the courts we had reserved, so we weren’t sure where to even start trying to claim a court. And then even if we figured it out, we both have bad social anxiety so it seemed rather intimidating to kick off this large group that was rotating through doubles games there, have them be annoyed with us, only to watch the two of us absolutely suck playing singles? I’m assuming drop in play is a regular thing there so we were wondering if it’s just not really a court you should be making reservations for?

We’re very new to this so we’re struggling to figure this out and really not sure what we should have done here. How were we supposed to figure out which court we had reserved? Do these large groups playing expect to potentially get kicked off if someone shows up with a reservation? I know with the reservation it’s technically our court to play on, but is it a dick move in pickleball etiquette to reserve what seems to be a popular spot for drop in play? We want to get good enough to try some drop in games but we’ve literally never played before. Are there other courts that would be better to reserve for the two of us to learn on?