Classic Whats the best way to get started playing a tank in mythic + ?

Hi i plan on playing a tank next season but i've never tanked nor mythic + in dragonflight yet. (And my knowledge of tanking was only few casual keys for fun as so far i've mostly pvp'd)My question is, how do you guys learn the route and all? i'll probably be playing a brewmaster or DK (havent decided yet) how should i approach things? My plan is to be able to clear some +20 for my own challenge so yeah any advices would be great (especially regarding consummables/routes stuff like that) via /r/wow https://ift.tt/vxy3IQq