If you don't want to - or can't - install Tribblix locally, you can run it in the cloud.
Many smaller cloud providers offer an install from ISO option, which can be used along with the regular install process.
Or you can run Tribblix on an EC2 instance on AWS.
There are AMIs available for both vanilla Tribblix and the LX-enabled OmniTribblix. These are available in the London (eu-west-2) region. If you set your region to London, launch an instance, and then search Community AMIs for "illumos" or "Tribblix" then you should get some results like the following:
If you want to run Tribblix in a different region, then you'll have to copy the AMI.
When selecting an instance type, avoid the new generation of m5 and c5 instance types (they should be marked as unavailable in any case). The m4 and similar generation instances work well, as do t2 instances. The t2.micro is just fine for Tribblix, and is on the free tier.
After launching an instance, you should be able to log in as root with your key pair. That's the only way in, there's no jack account, and no valid root password. You should create your own regular users, of course.
The images supplied only have a small system disk. If you want to store data, add an EBS volume and create a separate ZFS pool. (This will also make it easier to move the data to another instance when you need to.)