range x stack

Good night people.

I'm trying to learn this little game and I've come to realize that I need to adjust the pre-flop in every tournament situation.
I need to adjust to early game, middle game and late game. I need help setting up a rannge for MTT.

I know that each position varies from many factors, but what you tell me:
(EP, MP, LP) 20BB-
(EP, MP, LP) 50BB +

I have also missed some final lines, for not having a well-defined notion of call ranges. I got to pay with 77- in a coinflip situation against another player with 14bb (-)>
I always lose to give these calls.

If we could interact and bring these questions to productivity, it would be a help for beginners!!!!

Manin,

As you are starting is ideal start aa play more conservative, not bluffing, so you can understand how your players play and can take notes, observing the more you will be able to mount a range that will always put you on top, but have to study position by position . There are many ranges already mounted on the net, including by pro team, but ideally you ride one because then you will understand why playing in a way the AK UTG and CO other the way for example.