Java Edition is the default version for joining the server, and requires the least steps.
All you need to do is open up Minecraft Java Edition version 1.12 or newest (usually just the latest version is fine), enter the IP play.blockbender.com, and join the server.
Bedrock Edition covers the special Windows 10 Edition, MC on a phone, and MC on a tablet.
All you need to do is open up Minecraft on your device, enter the IP play.blockbender.com, enter the port 19132, and join the server. You can enter any name you want for the server.
Bedrock Edition is available on most major game consoles, including the PS4/5, Xbox and the Switch. These devices don't support 3rd party servers by default, but there is still a way to connect!