Go to the dock in Port Sarim and speak to Klarense in the game

Go to a bank. Get 2k, a hammer, and keep the 3 planks and 12 nails with you. Go to the dock in Port Sarim and speak to Klarense. Buy lostsaga gold his boat for 2k. Head inside the boat and use your planks on the three holes to prevent the boat from leaking.

Now head to Draynor Village, Speak to Ned, Ask him to sail you to Crandor. He’ll flashback to his past as a sailor and agrees to help you.

Now it’s time that you prepare yourself to fight the dragon. Equip yourself with good armor, a 1-handed weapon, the Dragon-Breath Shield, lots of food (preferably high healing foods), and any stat boosting potions if necessary. Once ready, go towards your boat in Port Sarim and head inside.

Ned will be waiting. Tell him you’re ready and the boat will set sail. Remember, once you sail away from Port Sarim to Crandor, the only way to go back is through a secret wall in the Karamja Dungeon, past where the level 110 dragon lurks.

Once the boat lands in Crandor, you’ll notice that you have to fix your boat again with 3 planks before you can sail back to civilization (what bad luck for a leak at a time like this). Get out of your boat.