do upnishads talk of Hinduism the way it is practiced today?

Dear student,
Most of the rituals , practices are followed same as that of which is written in the upanishads except for few changes such as dowry , discrimination of people etc..

Hope this information will clear your doubts about topic.

If you have any more doubts just ask here on the forum and our experts will try to help you out as soon as possible.

Regards