avoiding learning frustration

Hi, I have been out a total of 3 times on a longboard. By a fluke, our first day out landed us in perfected learning conditions. Big period, small waves, gentle offshore wind and long whitewash. At the end of the lesson I was hooked!
The second time we went out it was all wrong. Wind the wrong way and heavy, short period and violent waves with a strong current- but remembering how fun the first time was we were unphased! The third time out was better again, but big and there was a congregation of experienced surfers sitting off the 'good spot'. I tried to make use of waves breaking away from the experienced people but was having a lot of trouble telling if, or where the wave was going to break.
Watching the waves pass under me regardless of where my weight was on the board was getting to me. Exhausted and at the end of our time at the beach I got a bit bolder and waded out chest deep in the white wash where the experienced people were floating farther out and managed to ride 2 waves in on my belly, standing on neither.
My brief surfing carreer peaked early!
I assume my problem is recognizing the good areas for learning. can anyone share any advice to make my next time out more fun and less frustration?
The second time we went out it was all wrong. Wind the wrong way and heavy, short period and violent waves with a strong current- but remembering how fun the first time was we were unphased! The third time out was better again, but big and there was a congregation of experienced surfers sitting off the 'good spot'. I tried to make use of waves breaking away from the experienced people but was having a lot of trouble telling if, or where the wave was going to break.
Watching the waves pass under me regardless of where my weight was on the board was getting to me. Exhausted and at the end of our time at the beach I got a bit bolder and waded out chest deep in the white wash where the experienced people were floating farther out and managed to ride 2 waves in on my belly, standing on neither.
My brief surfing carreer peaked early!
I assume my problem is recognizing the good areas for learning. can anyone share any advice to make my next time out more fun and less frustration?