HI @Carlazar1389!
Exchanges listing ADA from the Cardano official site: https://www.cardanohub.org/en/buy-sell-ada/
A summary of Bittrex / Binance fees structure + Important security advices for beginners: Which is the better exchange platform?
You can send ADA to your Daedalus wallet from all exchanges. I recommend to buy ADA with ETH (faster and cheaper) and avoid Bitcoin at the moment. Basically, if you are already registered with any exchanges that lists ETH, you can send them to your Bittrex/Binance ETH address, then buy ADA with it. Maybe have a look at both Bittrex/Binance interface to help you choose the one you like most.