I have done a great deal of travelling/living in the regions where the Sami people live and work, mostly across the top of Norway, Sweden and Finland. I have not yet been to the Russian side.
If I were you , I would explore this side of yourself as much as you can. If you have Sami heritage you might want to know where (location-wise) it came from.
You might also want to read up much more deeply about the Sami people, there are different groups of Sami and different ways of dealing with the idea of having "Sami blood".
Some Sami have modernised, some stick to the old ways of reindeer herding across the northern Arctic lands. Some groups are not reindeer herders at all but coastal Sami, who are adept at fishing. Some Sami groups have certain health problems, groups also have different variations of the language....you can learn the Sami language if you so wish....nicest if you can visit Sami areas but given the current pandemic, a lot can be done online.
Given the BLM movement, you might want to think carefully abut the parallels (not the same but persecution links). Colonialism affected the Sami people too. White Europeans from the south moved up into Sami lands, took their lands from them (the Arctic is empty, right? No it isn't, thousands of indigenous peoples lived there and still do, it's their land). Sami roamed across the whole region but white Europeans divided the land up into borders....Russia, Finland, Norway, Sweden etc. This means that different countries deal with the "Sami problem" differently. In Norway, the Sami have a voice and a parliament at Karasjok...look it up on the internet, they have a huge collection of Sami knowledge and campaign for Sami rights to be heard.
Other countries also have Sami parliaments too, but to a lesser extent. The greatest number of Sami live in Arctic Norway. In Russia the Sami have no rights and are not recognised as a distinct people in the same way. The UN also has Sami on their indigenous peoples board, the internet has meant that many indigenous peoples are able to unite and campaign for their voices to be heard in a way they couldn't before.
You may feel this is far from your own search. However, I mention it because being a Sami or saying you have Sami blood in your ancestry can be problematic. Sami people suffered a great deal of harm in the 20th century, when the white governing population in Scandinavia decided the Sami nomadic lifestyle made them uncivilised, Sami children were wrenched from families and put into boarding schools, told they were inferior and must learn to live like Europeans. The Sami languages were banned....
These days there is a move to reinstate all that was lost, Sami has to be allowed by law and you will find signs in Sami as well as Finnish/Norwegian/Swedish in northern Europe. A bit like the Welsh in the UK.
However, all this has meant that some people, learning that they have Sami blood, refuse to tell anyone and it is a well-guarded family secret. Some feel ashamed to be Sami and do not want to identify with the past......it could be that this affected your adoption, or your adoption may have been for entirely different reasons, of course. Some people feel it's important to unearth their Sami roots and wish to identify as Sami, campaign and so on. You might want to watch the film, "Sami Blood" - look it up on the internet, and also read around the film beforehand. You should be able to find an English version, or one in Norwegian with English subtitles. It will give you lots more understanding of the issues, but it will also make you cry...…!
Good luck with your search. The Sami are wonderful people, I have every respect for them......