Please just attend to this helpful questions amicably and be polite in your answers?
Where do I begins? What's the best wallet you're using? Where do I buy bitcoin with easy exchange without scams?
Finally, should I do it now that the price is not stable or I should wait a little in case it goes down again? We are all here to learn.
Since you are new here, you must know about Bitcoin investment. Investing in Bitcoin is not a simple matter. Investing in Bitcoin is much more than risky business. There are certain principles in this risky business that you must follow.
Different people use different wallets to hold Bitcoins. The most secure hardware wallet is if you can afford to buy a hardware wallet to invest bitcoins. Besides, if you have money problem hardware wallet but problem then you can create Electum and deposit bitcoins there. Electrum Wallet is a very secure wallet for holding Bitcoins. Currently I'm using Electrum to store bitcoins.
You can use Binance Exchange or Kucoin Exchange to buy Bitcoins. Although the withdraw fee here is a bit higher, you can safely buy from here and bring it to your account. But you must be careful not to get the address wrong while doing transfer.
If you aim to invest for long term then I would suggest you to invest from instant market. There is no point in sitting in the uncertainty of dumping the market. If the market is instant, invest from here and wait for a long time if necessary. I hope you understand.