Dude, that’s some amazing job, specially given the conditions.

Don’t feel discouraged by the size - the next generation will be probably larger, since you got a really large crown. I think that they try to reduce crown size for commercially grown ones, dunno, but the second gen is typically better.

Fertilisation also plays a huge role on fruit size - as the plant is young you want to give it lots of nitrogen, but as it starts blooming shift the focus to potassium and phosphor. (I do this all the time with peppers.)