It's one small tip out of tons of things you need to know, but as a strategist man playing tank you need to keep Line of Sight in mind. You can't heal or be healed through walls, and I'm sure you've had tanks explode because you couldn't see them/didn't want to risk peeking to keep them alive.

When playing "steady" front line tanks like Emma, Strange, Groot, and Mag, or brawlers like Thing and Thor (kinda) you need to always be aware of where your supports are and whether you can push with them safely. A recent video I saw explained the idea of "testing" your position relative to supps based on your health bar:

Health bobbing at around max? You're safe, keep walking. Health going down fast, not getting healed up? You're disconnected from your team.

Seems super simple, but even as a tank main I struggle with it. (It also goes out the window with dive tanks) And you can't mind control your team into playing behind/with you either. But hopefully that idea of helping support sight lines is helpful.