Probably the last thing you want to hear, but I would recommend trying out every job until one "clicks" with you.
The easiest jobs imo are;

Tank: WAR (Least buttons out of every tank)
Healer: WHM (Super straight forward)
Melee: NIN (The hardest thing is mudras, but you can learn the patterns. Flanking only every 30s.)
Ranged: MCH (Honestly, I felt like I could faceroll my keyboard and regurgitate DPS)
Caster: RDM (Probably the most forgiving caster)