u/Demoncheese6

Hi, plat 5 tank here , I main Sigma and want to improve at the game. I've noticed one of my biggest flaws is my positioning, so I want to improve on that, but that's such a vague thing to focus on. What part of positioning would you say is most important to focus on first? I know there's high ground usage, using defensive cover, aggressive positioning, spacing, and probably more that I've never heard of, what would you say is the part I should focus on first before moving onto the others?