Number of fields

Hello, how many fields should I plant being a solo farmer?
I'm starting with Cabbage and I was thinking of planting 8 fields (2 for colewort, 2 for white cabbage, 2 for green cabbage and 2 for red cabbage). Is that good?
I'm starting with Cabbage and I was thinking of planting 8 fields (2 for colewort, 2 for white cabbage, 2 for green cabbage and 2 for red cabbage). Is that good?