Would it be a little too soon to take a new hamster?

[ShadowNinjaHamster]

Hello!
unfortunately my hamster passed away yesterday and I feel empty and sad. I was thinking maybe getting a new hamster would be a way to move forward, but wouldn't it be too disrespectful towards my previous hamster?

Also, I don't know any breeders, so pet stores are my only choice. How should I buy a hamster? Now I know not to buy the fattest hamster, just in case. If I bought dwarfs should I buy one or two? Because often they're in pairs.

Thanks.