Hi Ruslan,
If you are new to RT and DT then I’d recommend to take a look at ART first. This program was a fork of RT some time ago and now is its own raw processor. The goal was to simplify and streamline RT and then add new capabilities like Local Editing. The ART author Alberto is very active and helpful on these forums. ART is my favorite tool for raw processing since it allows to get good results without too much fuss.
Here is a new video describing how to set up and start using ART:
https://discuss.pixls.us/t/im-so-impressed-with-art-v1-23-ive-done-a-video/45909