Good choice for a beginning fish. I researched them when I was cycling a tank with fish. These are tough little guys and able to tolerate most water conditions. But, keep the water pure with large water changes every week or two. Tigers are aggressive, but if you keep them in groups of 8 or more of their own species, they'll wrestle with each other and leave the rest of the fish pretty much alone. You have a larger tank, so your fish should be fine.
Barbs like a lot of floating plants, so drop some sprigs of Anacharis and Pennywort into the tank. It grows well just floating close to the light source. Some hiding places at the bottom are good too. Species of Anaubias, like nana and nangi attached to pieces of lava rock make a nice little jungle. You can just drop the plants on the substrate, no planting needed.
If you have some specific questions, check out the "Aquatic Community" website. I've found it pretty informative.
"Fear not, my young apprentice. Just change the tank water."