Some people have been able to follow me (for example Patrick).
On the other hand, when I try to register to some crossposting services
(between FediVerse and Twitter), they are not able to recognize my handle.
So, maybe it is a client or library problem.
I run it on a Docker container, on my VPS on the cloud.
For more details have a look at my scripts:
It is also possible to install Mastodon with a single account, just for
yourself (SINGLE_USER_MODE=true, see Configuring your environment - Mastodon documentation). In this case
a 2GB VPS is sufficient. Otherwise (in multiple user mode) I would
recommend at least 4GB RAM.