No, you're not alone. Both your and my accounts are on the lemmy.world instance, which is the biggest instance by far and which I heard grew like 40% in the last day or two. It's groaning under the weight of all the rexxitors joining simultaneously.
Probably over the next few days, a combination of server side performance work and new users getting bored and visiting less will get things sorted again. But if you don't want to wait, you'll want to make an account on an instance with 100-1000 users, which is in the goldilocks zone of big enough to be unlikely to shut down and small enough not to be perpetually overloaded.