Hi, Welcome to the community :-)
My tip would be NOT to enable QOS unless you find you need it. What you certainly should enable is offload:
set system offload ipv4 forwarding enable set system offload ipv6 forwarding enable commit save
The reason I recommend against QOS is because it disables hardware offload. So you are gaining control at the expense of a LOT of bandwidth. The hardware offload is so good you won't need QOS for your network.
If, later, you want to try out QOS, you will be able to compare it with your baseline experience (with HWare offload, without QOS).