Just did a fresh install of 10.13.3, can I simply update to 10.14.3 ?

I just did a fresh install using this :

https://forum.amd-osx.com/viewtopic.php?f=24&t=4127

However, it's 10.13.3. Can I simply use the OS' updated to update to 10.14.3 ?

If not, what's my best way to do so ?

Thank you all in advance !