I have to say you worried too much my friend. I hate nutaku and their greedy gachas but the medals girls are pretty fair if i do say so myself. I have joined a guild in my first few days of the game and my guild at most only have like 4-5 active members. But despite i already had azai plus spare 200 medals. Just join a guild and play, it's not like you have to get the girls as soon as they are released