It may seem basic but starting off in the discovery age you normally only want to be gathering food (there are a few exceptions) with the aim of training a certain number of villagers before advancing to the colonial age. Obviously certain civilizations: France, Britain, Germany Russia etc start with random crates either and therefore your age 1 play will vary each game. The rest of the civilizations have the same crate spawn each time or the crate spawn will not affect your age 1 play. Below I have posted a list of the general number of villagers you want to train age 1, the buildings you need to build and the 1st card you should send in general for each civilization:
British: 200 wood 100 coin start: 17 villagers, build 2 manors, send 3 villagers - put 3 villagers onto wood from the start to gather enough for the 2nd manor
300 wood start: 17 villagers, build 2 manors, send 3 villagers
French: 200 wood 100 coin start: 14 villagers, build 1 house and market (gather 50 coin for hunting dogs), send 3 villagers - build tradepost and chop 100 wood for a house if you want to do an ff or semi ff
100 wood 200 coin start: 14 villagers, build 1 house, send 3 villagers - build tradepost whilst aging if you want to do an ff or semi ff
Germany: 200 wood 100 coin start: 17 villager population (5 settler wagons) send 2 settler wagons, build trade post and chop for house or vice-versa
200 coin 100 wood start: 17 villager population (5 settler wagons) send 2 settler wagons - build trade post whilst aging
Russia: 500 food 100 wood start: 14 villagers, send distributivism (wood trickle) build a house - chop 250 wood and build blockhouse whilst aging
400 food 100 wood and 100 coin start: 14 villagers, send distributivism (wood trickle) build a house - chop 250 wood for blockhouse whilst aging and possibly market + hunting dogs
400 food 200 wood start: 14 villagers, send distributivism (wood trickle) build a house - Possibly chop 100 extra wood for a trading post or save the 100 and chop 150 for a blockhouse whilst aging
Portuguese: coming soon
Ottoman: 400 wood start: 14/15 villagers depending on tc and treasurers. Send 3 villagers, build tradepost and house + market and hunting dogs whilst aging (again this depends on treasures too)
300 wood 100 coin start: 14/15 villagers depending on tc and treasurers. Send 3 villagers build tp and a house - possibly build market whilst aging
Dutch: coming soon
Spain: coming soon
Iroquois: coming soon
Sioux: coming soon
Aztecs: coming soon
China: coming soon
Japan: coming soon
India: coming soon
These are just general guides. They are especially useful if you are a new player and don't know where to start, or of you just want a solid build order. obviously, there are variations on theses builds and entirely different builds that you can use.