Need help surfing bigger waves

Last time I went out surfing the waves were bigger than I was used to. I am used to surfing waves in the 1-3 ft range. Last time i went out they were in the 3-5 range with a few 6 ft sets. I want to start being able to surf bigger wave. when i was out there i noticed they were very steep and whenever i caught them i would just fall forward before I stood up. I noticed alot of surfers were doing the same thing. The surfers who new how to surf the waves were doing well on them so they were not bad waves. I gave up after an hour and a half catching only 2 waves and I got pounded by the other waves. I was riding a 7.4 funboard and a 6.4 shortboard that has alot of volume. If anyone could gire me advice on the topic that would be great.