Tor Browser provides relatively anonymous browsing of both the regular internet as well as the deep web i.e. "Tor Hidden Services", such as private email, chatroom, social networking etc.
As soon as you download you should really read up on how to use the tor browser safely. Here's a dated but farely descent introduction. https://www.digitaltrends.com/computing/a-beginners-guide-to-tor-how-to-navigate-through-the-underground-internet/
WARNING: there's some really really fucked up shit on the deep web, always be careful what you're clicking on, if you're not looking for fuck shit you probably won't find it, but still be very careful.