Gonna be missing for a lot of days...

[Deorum]

... almost 2 weeks. Maybe more.

What is best to orientate my strategy, during that period?

I am level 22-23, just mentioning it.
Pretty much everything will be over by then , mines, fish-meat deposits, farms, etc.

I am thinking of building up my stores of low-grade resources, and slowly converting them to the higher possible matterial, example, steel swords.

[Saraptheold]

If you stay offline for more than 24hours the game freezes so that you can go on vacations and such

[Deorum]

Loll, the fan is that i am coming to norway, ahahahah.

I didnt know that, more than 24 hours = frozen game?

What if i log in just for 10minutes, after lets say 10days.
I get another 24h of game time?

[RuneMunki]

Loll, the fan is that i am coming to norway, ahahahah.

I didnt know that, more than 24 hours = frozen game?

What if i log in just for 10minutes, after lets say 10days.
I get another 24h of game time?

Yes you would. Also if a friend looks/buffs your island you will reset the timer as it's considered being active (apparently - I've not been on holiday yet!)