With the half high elf you don't need the feat for bb, the other big benefit of taking fighter at 2nd level is the duelling fighting style, +2 damage if use a 1 handed weapon and no off hand weapon. It's a great character to play you can really ham up the swashbuckling bit, I'm really enjoying it.
There are many ways to 'build' a swashbuckler, mc with warlock, fighter, paladin etc, or just go straight SB all the way through, your AC is less important as you will be 'kiting' in and out instead of going toe to to with enemies, mobility is key, let the tanks take the damage, harass enemies, hit em and run with BB.
Have fun!
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