anyone in 626 San Gabriel area free Sunday for help on OFT
 

i know it's simple and i've watched some videos on youtube, but still kind of scare using it on my one month old BRZ. i have the new version tablet in hand and i'm planning on use the V3 beta off the shelf stage 1 tune for now (v3 not v4 because i have a 2017 auto CALID: K00D, currently not supported by the new v4 tunes). i'll buy lunch ;)

If you wanna drive to Pico Rivera/Whittier I can help you.
Honestly tho its pretty easy to do on your own. The tablet gives you step by step instructions as you're doing it.

when first unpack the tablet, do i need to marry it with my car first (by reading the stock ROM from my car) or connect to my PC and upload the tunes onto tablet first?

Yup

use this thread it gives you step by step instructions as well as videos:
http://www.ft86club.com/forums/showthread.php?t=71157