greetings. unfortunately the alt raids are pretty much non-existent these days, but as inori said pinkbird does friday / sunday raids that you may or may not be able to participate in. as far as our main group, you are currently slotted as the third tank. your dps isn't sufficient to earn a spot as dps (not surprising, since you are a tank) and we don't need more melee anyway, so as i've mentioned before there isn't really a consistent spot available at the moment. we do have some flexibility for tanks, but my priority for the raid is to push progression so i'm more inclined to stick with our current tanks, since putting a relatively inexperienced tank into the raid will slow us down more than i'd like, mainly due to the fact that the learning curve for normal raids is still pretty steep.
that said, in addition to what inori mentioned, there are some things you can work on. unfortunately i do not have any experience with warriors, but i can offer some general tanking advice. first and foremost, the most important thing is to develop good raid awareness, which is something you can work on in lfr despite the fact that for the most part everything about an encounter can be ignored in lfr since the raid can be carried by the healers. in addition to general raid mechanics and not standing in fire, you should learn the relevant tank debuffs for each encounter, because unlike in lfr it is essential to taunt at the appropriate times in normal mode, as well as be aware of when the other tank needs to taunt to that you can ease off threat generation. you should also learn the cadence of each encounter, so that you know when it's best to use cooldowns and / or when healers are going to be busy with raid healing and therefore not able to give you their full attention, or if a healer dies and / or is otherwise unable to heal normally.
some specific examples, not necessarily inclusive of everything for each boss:
jin'rohk: know when to taunt after thundering throw and static burst
horridon: try to align your active mitigation (shield block?) with triple puncture, as well as when to use cds based on your current number of debuff stacks, and know when adds are jumping down so you can pick them up before they eat the healers
council of elders: know when to taunt for frigid assault and when to stack for frostbite to help soak damage
tortos: be aware of when bats are summoned and ensuring that you don't drop below 50% if you are on bat duty, or aligning your active mitigation with snapping bite if you are on tortos
megaera: learn when to use cds and be aware of when healers are otherwise occupied with raid healing or dispels
ji'kun: know when to taunt for talon rake
durumu: know when to taunt after hard stare / serious wound, as well as adjusting to being in the appropriate light beam, and helping out with life drain when necessary
primordius: know when to taunt for malformed blood as well as making sure the boss does not absorb volatile pools
a lot of this can only be learned by actually raiding, but being aware of the different mechanics before you get to practice them in a raid environment will allow you to adjust your personal strategy much more quickly. again as inori said, you should always look for ways to improve yourself personally, as well as to improve the raid as a whole.
anywho, hopefully this is helpful, and if you have any other questions or anything, feel free to ask
