Hey Anna!
Thank you for coming back! :) We're happy those details can help you!
The Leap Card is a good way to
travel around and can be used on Bus Éireann roads. As you're also going to Dublin, you can definitely take it since it can also be used on DART and Luas. :) If you want, you can have info on Bus Fares on
TFI Website.
Translink also gives you great details about
Tickets and Travel Cards. You will find there a lot of info about
travel cards! For example, if you are between 16 and 23 years old, you can apply for
the yLink Card and enjoy 1/3 off on all buses and train roads inside Northern Ireland. Take a look and see which one of those cards would be best for your situation!
It is easy to get tickets on the go for sure. You can buy tickets on the bus or at the stop! As for the Leap Card, you can get delivered to your home address in advance, or get it at the Dublin Airport when you arrive. It's totally up to you. For the Translink's cards, it takes usually 5 working days to arrive at your door. As you're coming in a month, there shouldn't be too many
travellers on your road, so you may be able to take your tickets on the go. However, I would advise to take them in advance so you can avoid last-minute stress! :D