Well Toni, Tandy leather has a whole bunch of Youtube videos on leatherworking, so I'd suggest you watch some of their basic leather working videos. Also go to Tandy.com and see if there is shipping to your country. You want vegetable tanned leather or tooling leather.
https://www.tandyleather.com/en/
Weaver Leather Supply also has Youtube videos.
http://www.weaverleathersupply.com/
You will need a minimum amount of equipment to start, but it can get real expensive real fast. Tandy has some basic kits for sale around $80 USD, but it will contain the minimum of tools you'll need. Problem is you live in Finland and shipping may be prohibitive. Check and see, but the videos are a good place to start.