Cinnamon crashes after login

Welcome at the Manjaro forum, @KASSIEROS3 :tada:

First thing to do after installing Manjaro should be updating and then rebooting. Then you can start to install packages. Have you done this? If not I would recommend just to reinstall as there is not much data worth to save from this fresh install.

When you first run the system, enter

inxi -Fxxxza --no-host

and post it here, so that we have at least the basic data of your system in case you get in trouble, again.

Otherwise, you could start here, if you prefer trying to fix your issue: