Hi Harvin:
Are the prices stable?
Bitcoin price is far away from stable. I think it will take years.
Are miners as dead as they use to be?
Unfortunately, home mining is not profitable anymore, but wait: if you live in a country where electricity is cheap (like China) and you want to invest money to get next gen low-consumption miners and build a serious farm, I suggest you to do some calcs
What miners do people use?
Mostly S5s....but check this out
https://bitcointalk.org/index.php?topic=1156770.0Sites to avoid and sites I can trust?
Maybe I'm too paranoid but...try to avoid as much sites as you can: gambling, exchanges (exit scams are more common than expected), please avoid all the sites that promises you to double your coins, they are ponzi schemes. Just read bitcointalk to get updates on Bitcoin world.
The best wallet?(old wallet was blockchain)
If you want a local wallet, I suggest Multibit. If you want an online wallet, I would try greenaddress, it's much safer than blockchain.info
Where can I fit in being a gambler or a professional gambler?
Don't do it. Be smart and don't gamble, you will save more money!