Here's the simplest way to improve your map awareness: every 5 seconds, glance at the minimap. Set a timer if you have to. Every 5 seconds, ask yourself:
• Where is the enemy jungler?
• Which lanes are pushed?
• Which enemies are missing?
• Is there an objective spawning soon?
After a week of consciously doing this, it becomes automatic. After a month, you'll wonder how you ever played without doing it.
The minimap tells you everything you need to know:
• Enemy jungler showed top → you can play aggressive bot.
• Mid laner is missing → they're probably rotating to your lane.
• All enemies are missing → they're doing an objective. Check Tyrant/Overlord.