Russia has a powerful icebreaker fleet, because it needs one. If you really think Russia is a global shipping power, go ahead.
Russia has a good railway network and can reach seaport in Novorossiysk (Black sea) , Crimea (Black sea) via newly built bridge connecting continental Russia and Crimean peninsula. St-Petersburg seaport on Baltic sea or Nakhodka (Japanese sea) from Siberia is no problem. Moreover , Lithuania and Latvia would be happy to accept freight from Russia in their se ports. They are making money. Belarus uses Lithuanian port in Klaipeda as it is closest. 25% of Belalrusian freight goes into Latvian port now. Both countries are competing for Belarusian freight. Latvia is trying to win Belarusian freight in they seaport