A little to the left of the "Sign up" button you can find a language section. Click on it and you will see all the language options. Developers of CSGOlounge'a website provided its users with two options: English and Russian.
The online platform also has a functional top menu. Here you can find various tabs such as "My trades", "My offers", "My bets", "Bookmarks", "Search" and "Add trade". Without signing in onto the website you can use only one of them, the "Search". Go to this inlay if you are interested in using it, fill out "I have" and "I want" areas, and click on the orange "Search trades" button. On the "Search" tab you will also see two additional subsections: "My inventory" and "Steam inventory".
If you want to just explore the CSGOlounge service, you can go to the homepage of the site and learn all the information, which is interesting to you. On the csgolounge.com website right away you will see two main areas: "Trades" (on the left side of your computer screen) and "Bets" (on the right). Scroll down the webpage and see all available items, which is published in chronological order. If you scroll down more, you can get access to the bottom of the homepage. Here you can find some helpful links: "Terms of Service", "Privacy", and "FAQ".