From there you can easily get the train to the center. You can stop according to your needs at several of the train stops. The cost of the one way ticket is around 3.2 Euro (June 2019).
We stayed at Wombat's CITY Hostel with 50Euro per pers per night for 2 nights in a double room, private bathroom, no breakfast. You can get separate breakfast for 4.9 Euro which you need to pay cash (as of 10 Euro you can pay by card). It's a decent breakfast (hostel level).
They have a great terrace which offers some amazing views over the Television tower.
And the Location is awesome.
The downside to it: very uncomfortable beds & horrible wifi
Day 1: Attractions - 22 km
Berlin Wall Memorial
BREAK: Brezel & Beer
Unter den Linden Street
Urban Nation Museum for Urban Contemporary Art
BREAK: Craft Beer at BRLO Brwhouse
Elephant with Earth Balloon by Jadore Tong
Check Point Charlie
United Buddy Bears
Dinner at Burger Vision
Day 2: Stretart - 18 km
Breakfast at Rose Garden
Area Around Revaler Strasse
Streetart: The Astronaut by Victor Ash
Dinner: Imren Grill
Television tower different hours of the day
*this is not a sponsored post. I am listing them here as from what I saw around it looked the best for my personal taste :)