Tick anything you already have, in any order. Quests unlock once this is done.
Condition is most of a card's value and a bare card in a pocket is ruined. Sleeves cost a few pounds and protect everything you buy after them.
2 things left above. Quests are real things you go and do, so they only make sense once you have what you need.
First one waiting: Sleeve and file everything you already own