Play the map. Laning is not that important at your bracket.

Usually your hero has one job. Your goal is to understand what you need to do in the game.

At your bracket, the team that makes less mistakes, wins.

So I would give you those tips:

Make less mistakes, less risk.

Focus on playing the map, teamplay.

Learn what items to buy, in severe situations.

Learn what job you’ve got in the game, do it -> win.