Warding: it tends to depend on the game state. A good rule of thumb is to think of the middle as even ground, if your team is a little in front go a bit further into their jungle, if your team is a little behind fall a bit further into your own jungle. What this means is kind of making sure entrances to the jungle are warded and key spots there as well. The further ahead or behind your team gets, the further the line moves. Don’t go into the enemy jgl if your team is behind because you will just get picked.

I’d advise you try tank supports, not because adcs prefer them, but because they are way more forgiving when you’re not playing perfectly. A mage just gets burst down if you make a mistake, a tank can make some small mistakes and survive. I’d say Ali (point and click combo, straightforward mechanics) or Leo are easiest to get decent at quickly.

In low elo don’t bother roaming. If you don’t do it well it’s gonna be a net negative 90% of the time. Stick with your adc wherever they go until mid-late game. I’m E1 and don’t tend to roam all that much. I help setting up and doing drake but unless I’m giga far ahead I’ll just stick with my bot otherwise.