I wanted to learn about igling and calling , especially the stuff like defaults , things u see like when u watch an enemy peek at a place, some other area is smoked off, how do I learn abt all this??
You can learn it but you have to be a natural thinker really, just as there are some people who are gifted mechanically, others are strategically and others are gifted with being natural leaders. Don't igl in ranked, you WILL get people out of their comfort zone, they WILL do bad and they WILL tilt and play worse, or even flame you. The best advice I could give you is to get a five stack of friends or people you know will follow your calls and then start with basics.
The most basic stuff I can think of is calling plays, not really strategically but out of feel. Call util combos, player stacks, defensive setups and things you have in mind. Then start implementing those things when you see there's an oportunity to counter the enemy team.
For example if we're playing Lotus attack side and you see your team get blasted everytime you try to get early A main control, try to think around that. If they always win their A fight that means they are investing 2 or more players (very likely 3) so you can make an educated guess, leave your Viper holding the A main push (holding, not fighting) and contact scale C and B at the same time with your 4 remaining players.
The idea behind this is, the enemy invest 3 players to control A main, so that means B and C main are probably free. Your players can just walk up, use utility if needed, and then take the space. You found a counter to their A main take, and you got something back instead, and now you can play the round around what you see. You see your Viper being pushed out of A main to spawn? Probably a good idea to speed up your C or B take (you can open the door and pivot around both sites and you WILL beat the rotates as long as you choose correctly)
I know this is specific but is the first example that crossed my mind