A little preparation goes a long way
Before joining a group, finish updates, check your audio and leave a few minutes to settle in. A familiar setup makes it easier to focus on the game and the people around you.
A comfortable desk
Keep the screen at a comfortable height, soften the room lighting and take a short break between matches. Small adjustments to posture and sound often matter more than another accessory.
Keep useful notes
Save the keybinds, settings and small discoveries that work for you. Revisit them after a few sessions rather than changing everything at once. Consistency makes comparisons more useful.