Can I get or file divorce if I am just a tourist visa holder?

Your immigration status is irrelevant. You must have been a NV resident for 6 consecutive weeks, and you must intend to stay in NV "indefinitely." If there are children, NV will not have jurisdiction over them other than to have you pay child support (since NV has jurisdiction over you). If your spouse will cooperate, you can proceed with an uncontested process through a Joint Petition. If your spouse will not cooperate, the process could take quite a long time, as your wife must be served with the legal papers in her home jurisdiction (and can contest jurisdiction if children are involved).