New train lines (2026) between Riga and Tallinn?

Hi, Has anyone traveled recently between Latvia and Estonia by train? I heard that new lines have opened. Is it easy? Is there a train change between the countries? The company’s website https://bilietas.ltglink.lt/ is under maintenance, and I can’t see the trains available starting from 06/12/2026 (the date I’d like to travel, either Riga-Tallinn or Riga-Tartu). If anyone has a recent experience to share, I’d love to hear it :) Thanks so much, Aurélie