You increase your size of waves capacity in small increments

you get your skills improved to handle the smaller sizes then take on bigger waves. If you can't paddle out or you have more fear than confidence you are not ready for bigger waves.
Handle what you can on your standard days and graduate to taking the bigger waves on those days then make those waves the size of your next increment
The other method is not so good paddle out on a big day , and realize how out of your depth you are
( NOT good advice as being out of your skill zone could be harmful or fatal).

It may seem I'm giving you a hard time, read your posts and you will realize how much of a novice you are and hopefully commit to a reasonable evolution in your surfing.
I hate having to rescue guys who overstep their abilities, and often it scares them away from surfing entirely.
BTW any surf school that puts novices out in 6ft plus surf deserve to to have the book thrown at them!