@Rockin Strings Let me know if this still doesn't clear it up.
As a fighter you can choose 2 of the following skills to be proficient in: Acrobatics, Animal Handling, Athletics, History, Insight, Intimidation, Perception, and Survival. My personal recommendation for what you should choose based on what I know about your character would be Acrobatics (some fighters choose to be proficient in both Acrobatics and Athletics but most Acrobatic/Athletic checks can be substituted for the other skill as far as it goes with me being a DM), and I would recommend either Survival or Perception as the other skill. I think we have enough players with good perceptions that you would be better off choosing survival. However, you can choose whatever skills you want to be proficient in, it is your character after all. Any of the skills you are proficient in will add your proficiency bonus which is currently +2. All other skills will add your ability modifier for that skill. For the example I'm giving you below I'll assume you have chosen to be proficient in Acrobatics and Survival.
Character Name: Gabriel Hawkwing
Class & Level: Fighter 3
Race: Avariel (Winged Elf)
Background: Orphaned protector of his twin sister.
Alignment: NG
Experience Points
Abilities & Modifiers
Strength: 17 +3
Dexterity: 18 +4
Constitution: 15 +2
Intelligence: 16 +3
Wisdom: 10 +0
Charisma: 15 +2
Skills
Acrobatics: +4 (Dexterity Modifier) +2 (Proficiency Bonus)
Animal Handling: 0 (Wisdom Modifier)
Arcana: +3 (Intelligence Modifier)
Athletics: +3 (Strength Modifier)
Deception: +2 (Charisma Modifier)
History: +3 (Intelligence Modifier)
Insight: 0 (Wisdom Modifier)
Intimidation: +2 (Charisma Modifier)
Investigation: +3 (Intelligence Modifier)
Medicine: 0 (Wisdom Modifier)
Nature: +3 (Intelligence Modifier)
Perception: 0 (Wisdom Modifier)
Performance: +2 (Charisma Modifier)
Persuasion: +2 (Charisma Modifier)
Religion: +3 (Intelligence Modifier)
Sleight of Hand: +4 (Dexterity Modifier)
Stealth: +4 (Dexterity Modifier)
Survival: 0 (Wisdom Modifier) +2 (Proficiency Bonus)