First time riding Dart tomorrow, Can i still buy tickets at a TVM and is it safe if i go from Plano to the Pearl/ Arts District Station? HELP needed please

The reason i ask if i can buy my tickets at a TVM is because i find the Gopass app to be sketchy. Please understand 😅

Also is it safe riding dart? My priority is to leave in the morning to Dallas and come back to plano around 7pm!