Confused about increasing

Hi I’m a beginning english knitter and I’m kind’ve confused where exactly I’m supposed to create increase stitches…in the beginning or middle? I just need to get it even…
Also what do all those increase terms mean like m1a, m1t, m1l, krl, yo, basically what are the differences between them?

Thank You so much for the help!!!

Have you looked at the increase part of Basic Techniques? Those are all different ways of making increase, some slant left or right, some are more hidden than others and YO makes a hole, for a lacey effect. Patterns will instruct you where to inc, sometimes mentioning which one to use - kfb is common. They’re mostly made on edges, but can be in the middle of garments for shaping.