Blockchain wallet. I got to know about it when I was a newbie in the crypto world. It is however a hot wallet, it has both an andriod and iOS app and you can also access your web version. The Android app is a bit funny, as you can share funds to another person with just scanning the QR code. It is a quite reputable wallet, that is constantly gaining popularity
Blockchain wallet also have an exchange,I have not gone through it personally
With its excellent UI design and its trading, buying and selling bitcoin option, it is a great choice for you as they are centralized, qualified and reputable professionals