"Do you think this is a good idea?"
No. It will not be effective.
"I'm teaching myself how to be psychic."
Yeah, problem with that is that actual 'psychic' exists only in stories, like magic and superpowers.
"I can infuse candles with Fires of the Holy Spirit"
No. Only regular fire.
"and sell them for $100 each."
That you certainly can. There are lots of people who are less smart than you.
"I guess the price of each candle really just depends on how
many people are interested."
It depends more on your ability to reach rich people with your marketing.
"If only ten people are interested,"
You stay poor.
"I can lower the price."
Then you'd be even poorer.
"But if 200 people are interested, I may
not have enough to time to meditate on each candle,"
You don't have to meditate on each candle. You can meditate on a million candles at once, the effect is the same.
People would not even notice if you didn't meditate at all.
"so I'll need to raise the price."
No. You only need to raise the price if you want more money.
"For example: Red-Fire of the Holy Spirit brings grace. Pink-Fire
is love. Emerald Green-Fire is healing. White-Fire is peace, purity. "
No. That is nonsense. Green looks harmless, but it is absolutely poisenouos.
"Do you think many people will be interested?"