[It's hard to gauge which topic is for what, @pluginou :)]
The short answer would be to try setting up trac in your home user environment, using pip or easy_install like the Trac documentation suggests. I have never done it so I can't tell you how far along you'll go in using this approach.
The other option, if you realize you need root access, is to spin up a VM in https://cloud.dreamhost.com and put it there. Make sure you create a volume for your data, too.