Is this antivirus a decent choice to protect my PC?
By default, Baidu company is Chinese which means their products are targeted to Chinese people, but that doesn't mean you can't install it. I have checked it website and it also has English language support. Yes, it's a decent antivirus that can pro actively protect your PC, but if I were you, I would pick some antivirus that's known and appears in monthly tests. For example, Avast, Eset, Kaspersky, Bitdefender. They are all both good, an only you can see what fits best for your PC.