Playing a game immediately after learning the rules is my favorite challenge - especially when the other players are all new too.
At this stage, tactics are mostly about keeping all the rules in your head and thinking hard before each move. But strategy is really interesting. Everyone is guessing blindly, and you can often win by guessing slightly less blindly.
I have two meta-strategies:
(1) Game phases
While learning the rules, whenever possible, mentally categorize game mechanics as opening-related or endgame-related. For example, a lot of board games have some engine-building in the opening and some point maximization in the end.
During the game, constantly estimate the distance to the end of the game. On the first playthrough, most people transition to endgame too late.
(2) Mechanics comparison
Whenever a game has different types of mechanics or resources, search for reference points that compare them. For example, in Dominion, you must choose between buying treasure and action cards. So on the first playthrough, you should deduce that 1 silver is similar to an action with (+2 treasure, +1 action).
The article talks about the metagame transition in Splendor, when players realize that a strategy with minimal engine-building is viable. I deduced that on the first playthrough by trying very hard to estimate the value of a 2-cost card vs taking resources.
Of course, you need to continuously re-evaluate as you understand the game better. By I have a very high winrate on first playthroughs relative to my general ability.
Does anyone else have meta-strategies for this situation?