Once you're ready then hover over each island on the map. There you will see the recommended level for each item in addition to the number of Lost Ark Gold seeds, combat style (PvE or PvP) and whether or not you've obtained an Island Soul. You'll also see how long it takes to get into the island. From this data, we could broadly divide Lost Ark islands into four types:

Permanent PvE islands. The most frequent type. You can visit them at any time you wish to.

Time-limited islands. The only way to access these islands at certain times. Click on the island's name for the hours of operation.

PvP islands. They're usually available on a permanent basis or scheduled, but you can always fight PvP in these areas. You can recognize them by the crossed swords icon that appears on the map.

Adventure islands. Special co-op events that happen just a few times per day.

So, you've arrived at your first tiny island. What's next? Even though every Lost Ark island is unique It is common for them to be open to one or more of the following:

Complete quests. Sometimes it's obvious to see an exclamation mark on the map, however, the quests could be concealed.

Visit NPCs and merchants. There are many islands that house merchants and NPCs. The latter are rewarded with specific rewards that are unique to them be sure to stay on the island until you've taken a look.

Collect cheapest Lost Ark Gold. Yes, there are mokoko buggers also on Lost Ark islands as well. Since the maps are small they usually have between two to five Seeds on each island.