If you want, you can move your Mastodon account from one instance (server) to another.
Moving lets you take your followers, follows and some settings with you.
1. Create a new account on the instance you want to move to, but DO NOT delete the old account.
2. Log into your NEW account, go to Edit Profile > Moving From A Different Account, click on "create an account alias" and follow the instructions.
3. Log into your OLD account, go to Edit Profile > Move To A Different Account, click on "configure it here" and follow the instructions.
4. On your OLD account, go to Preferences > Import And Export > Data Export and download the settings and follows lists.
5. On your NEW account, go to Preferences > Import And Export > Import and upload the lists you just downloaded in the previous step.
After doing all these, your old account will redirect to the new one, and your followers will transfer automatically (with a short delay).