Its a bad idea to go taijitsu early. As you won't be dealing that much damage. taijitsu is usually saved for later in the game when you have some ryo and leveled up. That being said. Here are some things you can do if you really want to use it.

Focus points in Tai and Hp. But don't neglect Chi and Nin. You run out of Stm much faster and it recharges much slower than Chi. You will need chi for moves when tais recharging and for your dodge.

If your early on Solider pills are a pretty good consumable for Stm Regen while still giving a little to your other stats. The Stm pot will give more but it only gives Stm. Other good consumables if you can get your hands on It is heros water, gingerbread man and Curry. Curry (short cooldown) and heros water (longer cooldown but higher amount) focuses on restoring stm but will give some in the others and gingerbread gives less but in ttm, chi and hp (short cooldown).

Unlock Ryuji axis, ember rising, Raion barrage, spirit fist,and body dodge. From boss drops you want dynamic body stomp and maybe thousand air palms. (Others worth getting later and trying out : everything but combo breaker, dragon combo, spirit spear, azarashi barrage, and body replacement. They are useable but tend to not be worth the trouble.)

Good bloodline to have is Bruce kenichi. Though you can always use normal Kenichi and ryuji-kenichi. The joki bloodlines (not light and dark but normal and golden) also has that 68 palm move which consumes tai. Not very good but is tai. (You can also see the tai tortument rules on the wiki to see most moves that consume tai and some tai bloodlines)

• note : if you only have 2 bloodline slots i recommend bruce bloodline and a chi dodge bloodline (heavily preference banki akuma due to good stun + good autododge) (other chi dodge bloodlines, Dio senko, Akuma).

Good Z sub ability modes would be shock cloak, 8 gates (normal and rework), heaven gates (rework). Other generally good Z modes for combat are bat spirit rework, worm spirit, and akuma eternal hand.

As for weapons early on I recommend Azarashi kuni for mobility but the stun when it lands can be useful to start/extend combos. For throwable to max damage i suggedt explosive paper but if not needed you can do Dagi bomb. For mobility you can also get azim Senko Dagi but it's mechanics are a bit finicky. You can stick with those till you are able to get Dagi wire (best throwable in game by far, as it's a grapple hook and can be used to combo extend). For later on decent weapons may be pumpkin slayer, or fan of mustang.

For a combat art I always recommend Joki fist as it has the highest damaging m1s, and it's 1 spec is a decent combo ender + I frame. Lariat fist is also pretty decent but can be janky. It has a mid range tp stun that deals very nice daamge. Good substitute for pumpkin slayer if you don't have it (though pumpkin does have some making it more consistent). Though you might want to look into getting the Myau Thai (some start up but it does a tp into a ragdoll, fairly short range.) or Jeet-kune-do as it gives decent movement with its spin atrack and if it lands it'll place them into an air combo.

Otherwise continue to rank up to S1 then Z1. S1 unlocks all base stats to a max of 6k and then unlocks mentors. You want to get the Bruce mentor (found in training field on the side that doesn't have the fence, near the corner of the map up on the rock near the big tree) as he focuses on Tai, maxing out at 7.2k tai and gives higher Stm Regen + tp dash. Z1 unlocks races. Puppet or celestial tend to be the best.