Seeking Advice on Cryptocurrency Platforms

I'm relatively new to the world of cryptocurrency and looking for some guidance. With so many platforms available, it’s a bit overwhelming to choose the right one. Could you recommend some reliable and user-friendly cryptocurrency platforms for trading and investing? I'm particularly interested in platforms with low fees, strong security features, and a good reputation. Additionally, any advice on what to look for when selecting a platform would be greatly appreciated. Your insights and personal experiences with different platforms would be very helpful. Thanks in advance!