I'm glad you like it! I won't give away all my secrets, but:
1 - Clear all the fights with more Maids.
2 - Yes; short answer, visit Big Dick's more often.
3 - The pond is just outside the south exit; go west.
4 - Yup. Do that, then talk to the bald elder.
5 - I'm considering making a full guide, but it'd be a huge undertaking. More on that after v1.0.
6 - No. After v0.23.4, the next update is v1.0. Updates after that will just be bug fixes.