Which souls game should I get?

There's a sale on PlayStation and I can afford one game, it's between DES (ps5), DS1,DS2, or DS3.

I've played Elden ring and sote and loved it

I've also played sekiro and loved it.

Just wanting some recommendations between those games

Edit: Thanks to your advice, I've decided to start with ds1 remastered

Second edit: a lot of people told me I can get the whole DS series in a box set much cheaper than I could online, so I got demons souls, and will look for a box set in the meantime