OOC:
Ah, I see now. You didn't apply your skill ranks. You, as a swashbuckler get 4 plus your Intelligence modifier (+0) skill ranks to spend at 1st level. Because you are human, you get an extra skill rank each level (for a total of 5). The way skills work is that you can put ranks into the skills of your choice. You cannot have a skill rank higher than your total level. At each level, you get 5 more skill ranks to distribute as desired. Because you cannot apply more ranks to a skill than your total level, at 1st level, you should have five different skills. Each rank adds +1 to your skill, plus the modifier for the governing ability score. So, if you were to put a rank into Stealth, for example, you would get a +1 for the skill rank plus your Dexterity modifier (+3) for a total of +4.
The exception is class skills. Class skill grant a +3 bonus. Your class skills are listed below. So if you put a rank into Knowledge (local), you would have a +1 for the rank, +3 because it is a class skill, plus your Intelligence modifier (+0) for a total modifier of +4. For you, class skills are Acrobatics (Dex), Bluff (Cha), Climb (Str), Craft (Int), Diplomacy (Cha), Escape Artist (Dex), Intimidate (Cha), Knowledge (local) (Int), Knowledge (nobility) (Int), Perception (Wis), Perform (Cha), Profession (Wis), Ride (Dex), Sense Motive (Wis), Sleight of Hand (Dex), and Swim (Str).
Some skills can be used without putting ranks into them (untrained). If the skill allows untrained use, you simply use the appropriate ability modifier. So if you didn't put any ranks into Stealth (which can be used untrained), you would have a +3 (your Dexterity modifier). If a skill can only be used if trained (such as Knowledge (local)), you must put ranks into it to use it.
A skill list can be found
here, whether it is trained or untrained, the appropriate ability modifier, and whether there is an armor penalty (a penalty that is applied when wearing certain armors). Just ignore the class skill columns. How each skill is used is described
here, just click on the skill name for a complete description.
Backgrounds, such as the Sailor background, are not used in Pathfinder 1st edition (that particular background is from 2nd edition Pathfinder). Instead, if you wanted to represent your past as a sailor, you would simply choose Profession (sailor) skill and put a rank into it (there is no Athletics skill or Underwater Marauder feat in 1e).
I apologize. I should have checked your sheet before we started and I neglected to do so. I hope that this clears things up a bit. If not, let me know and I'll break it down further.