No - Windows defender is built in and more than sufficient for protection.
Windows 10 pro really isn't necessary - here are the things you will miss out with only having home:
https://www.pcgamer.com/whats-the-difference-between-windows-10-home-and-pro/ - RDP is really one one I could see being a potential issue, but there are many different solutions to achieve remote access.
The built in windows security features should protect your pc for the most part.
Don't click shady links, make sure you are aware what you are running when you run/install something.
Don't open attachments/click links in emails if you don't know what exactly it is.