I managed to move the ship to the shore and build a settlement with warehouse with three turns. Now what i should do, what is the goal i should have to win the game? Also, how can i see which are my adversaries and how are they advancing?
Send out scouts. If there is a seasoned scout in your immigration queue that's great but otherwise buy 50 horses and equip one of your colonists. One scout is essential but two or three would be better still. Explore the map and meet the natives. The chiefs will give you money and there are burial grounds and ancient ruins to loot.
Meanwhile build up your colony, a stockade and a dock first then a production building such as a Weaver's Shop (depending on what resources you have available in your colony). If you put a statesman in your town hall your territory will expand and if you build a church it will increase the supply of immigrants. Send your ship back to Europe with raw materials to sell, and collect those immigrants who wish to go to America.
Don't neglect your defences though, buy a cannon when you can afford it or ask your King for help. Put your soldier to work in your colony but retain his guns in case you need them for defense. Generally though you should have a long period of peace during which you can develop your colonies.