Greta, you need to add the topic to the left-navigation of home page. The answer is here: https://community.tribe.so/question/5cd31d4a2014660640dd2d4c93
Also, make sure that you know about the different topic types:https://community.tribe.so/question/5cd1da44dc7fef4b3cba31d0107
I have added it for you though ;)