Hey guys, this is my first post on this board so forgive me if i do anything wrong.

I'm planning on making my first backpacking trip, i am gonna go to oslo, from there i'll hike all the way to bergen and from there on i'll go all the way up north to see the northern lights and i'll move back through finland to helsinki, i'm gonna plan route's between two cities each time that have to be 3 to max 6 days walking apart and when they are longer dan 3 days apart i'll have to plan a route that passes by one of the dnt cabins which i'll get a year membership on.

My plan is to walk all of it and to take exactly no buses or trains at any time
I will be sleeping in nature or in one of the cabins
I will wash my clothes and everything in the lakes and i'll also take water from those so the only thing i have to worry about is food and gas for cooking and maybe some coffee

If anyone has some advice or tips or anything that can help me prepare for this trip please let me know
If you want to know anything more of my plans just ask