Hello Aldrin and Welcome to the Percona Community.
So, reading error log whenever I see “Connection timed out”, I always question that something is blocking me from talking to someone else on the other side. Check firewalls selinux or other networking access and verify that the following ports are open: 3306, 4444, and 4567.
Also check this question hinting at similar problems for PXC.
Thanks,
Kedar.