If your instance is having troubles, I'm sorry.
With the whole #Twexit, Mastodon's userbase has jumped from about half a million in October to 7 million as of today.
All the admins are working hard to keep the lights on, but many only become aware of the problems when they happen.
Be patient. This will resolve, and the Fediverse will be all the stronger for it.
Meanwhile, if you want to help, head to your instance's /about page, and see if they have a patreon or tip jar.