The Codes and paw are a late game mechanic introduced not long ago, so they aren't necessary to pass the game, even less in the beginning of the story.
The skill indeed are important though some of them aren't that useful to level up (aside to get cooldown), look at the
wiki, see the skills of the servants you have and the materials they need to be upgraded, based on that level up the ones you think will be the most useful, easier to do because of the materials and that are worth do to their improvement.
Problably no? I mean, he just said he will calc feats, no make profiles. If you want try asking personally others if they want to make them or just do that yourself in the future (preferably when you reach the story chapter in which they appear).