Are there 2 types of HDMI cables?

No, There are technically four types of HDMI cables: Type A (Standard), Type B (Dual Link), Type C (Mini), and Type D (Micro). However, Type B (Dual Link) is rarely used and most commonly found in professional settings.There are several types of HDMI connectors, but all HDMI cables have the same 19-pin configuration and can transmit the same signals.
The three most common HDMI connector types are Type A (Standard), Type C (Mini), and Type D (Micro), with Type A being the most widely used.

How do I know what HDMI cable to buy?

When choosing an HDMI cable, there are a few things to consider:
HDMI Version: Make sure the cable is rated for the version of HDMI that your devices support. For example, if your devices support HDMI 2.1, then you'll need a cable that supports HDMI 2.1.
Length: Determine the length of the cable you need. It's generally recommended to use a shorter cable whenever possible, as longer cables can result in signal loss.
Quality: Look for a cable with high-quality materials and construction, as this can affect the signal quality and durability of the cable.
Compatibility: Ensure that the cable is compatible with your devices. For example, if you have a 4K TV and a 4K Blu-ray player, you'll need a cable that can support 4K resolution.
In general, a high-speed HDMI cable with Ethernet is a safe choice for most home entertainment setups, as it supports the latest HDMI versions and features.