Fire Tanker Advice

I am new and am looking for advice on my build:

https://www.pathofexile.com/fullscreen-passive-skill-tree/AAAAAwUBBUIGDgY5CaoJ9gthDF8RLRJpFVAXHBg8GFYYZRjXHKcdFB8YIbAk2CftLJwulDLRNPc8LT0PQYdBlkNjQ8hFR0WdTwRPfVFgUftTUlOlValboFxrXsBoWGh0aPJqAXFNcXlyqXwOfIOAVoNfg8yESIVtiFqJ2IuMj0aUoJeFl7Saz5rgm6GnCKdVrJivbK-Nr6e3PsBmwJrDbcQVxPbGrs0W0PXUfNWB2CTZ_Npi6-7xbPMG99f53fno-6o=

Currently I am a level 8 templar. I am aiming to be a tanker specializing in fire casting for attack and life regeneration & armor for defense. Any critiques?

You have taken a lot of nodes all over the place so far.
Playing a caster with firespells is fine, but you have to decide on a route you want to go.

In general fire spells go well together with life nodes and life regen, as you picked up some of those aswell - so there is no real need to go for ES as well.

You took crit nodes, but it doesn't seem to focus on crit. It would also be difficult to pull of a Crit/Tank/Shieldblock/Burning build all at the same time.

I would drop the crit and burning damage nodes together with Avatar of Fire (which does nothing for you)
and focus on Life + Armor and some Fire damage.

It could look somewhat like this:

https://poebuilder.com/character/AAAAAgUA2fwJqsCai4z53cBm8B-iAASzaPKCm-FzOtjsOGZUhXsaOJBVJy89D3y7_lQNzStQHM6vp_MG-6oGOVFgCfbUfAYOJ-3E9s9-rY3ZYRkuaGXzm1cNggfyQdIheTnp1Z7NGj5-4ikufLjyL-8OFCBfP1BHPfyMz_ZIxFhYY9i9_gq3PoPMPC3GroNfplc64fJF_o81kk3j-ehBh2h0GFbaYu08mjvVplOlHKcMX5HOlmwt0gGRAeenMBiRvJ_8SxRN2sGE72EhGlU26MGCTUZi7NNvLlMFLXTteu-srwz3qZXAv0CgEuGi6oTZL8xlTb02R3677Q==