i have mavin sword now,and I came to Britchmon port,bought my ship,but I don't wont to lose my time only for looking
where to go,so I asking you...maybe I have to go to the Scool isle now,or to the enchanted sea.

There are a number of quests you should have got from the port guilds. You will need to explore all those inlets around the enchanted sea to do them. You can only get to the lost sea through the Temple of Isis which is across the lake on the enchanted isle and you get only enter the temple after meeting the Lich in Skull Castle.