Merjan, is Tartu worth a day trip? It looks like you can take the train over early in the morning and come back in the afternoon. And thanks for the above!
Yes, I think Tartu is worth visiting. I've been there 2-3 times but not recently. At least some years ago the bus tickets were cheap, maybe train tickets are, too. It's an old university city and they have a new National Museum there. It's Rahva Muuseum in Estonian. I'd love to go there, I haven't been there yet.

(I'm *terrible* at ice skating; not a single Dutch ice skating gene in me!)
Thank you for all tips, I start making my schedule today!