ZhexueM I am happy to hear that you got through on installing DW.
- You should be able to safely install a theme from the DW directory. A theme should not be able to destroy anything in the installation.
If I may be so forward to recommend the Strap template, which comes with a suite of plugins (Combo plugin) to solve several needs. The best part is that it comes with its own website of example code so you can directly build modern UI inside your wiki pages. That’s a huge win. And second best part is that the developer is very responsive and friendly to help you with questions. In fact, he has already introduced himself, gerardnico, so you should be good to go.
Best of luck, if you need any help just ask here and surely you will get it.