The ones you've found where you have to pay are scams, I'm afraid. When was the last time an employer asked you for money? Even temp agencies charge the employer and not the staff.
Since you have some time on your hands, try working outside the home instead in a field that you can telecommute with later (translation, technical writing, transcription, graphic design, consultant, et cetera). The home-based work is usually reserved for more senior staff, so the earlier you get in, the better, and a lot of work lends itself well to maternity leave.
For the most part, the only people with these dream job situations are either self-employed or especially cherished by their employer. There's no easy route to the easy work that pays above the poverty line. It largely is an earned privilege.
You're at the very best time in your life to set up your future opportunities. If you have to work for a few years before getting to stay home at your usual pay, so be it.