Welcome backkkk! XD
I'm also not really that much active here on Steem anymore (although I still try to post at least 1 quick blog post everyday for the auto-upvotes heh) but mostly only stay now to finish my daily quest on SteemMonsters and do some quick upgrades on NextColony and Drugwars every now and then.
Gratss on making it to Silver II and hope you will make it to the Gold leagues before the season ends.
I've found out that skills aren't the same as buildings (after spending all my resources on that), but I'm not yet sure what those skills actually do.
Yep! They aren't the same. You need to upgrade the corresponding skills first before you can upgrade it's corresponding building. Say if you want to increase your Core Mine building to level 2, you need to at least have Core Mine Skill level already at level 2.
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