What could be the best racket for beginners?
Get ready for almost any kind of recommendation ...
At the end of the day it comes down to an allround blade like the Primorac off -, Appelgren Allplay, Stiga Allround Evolution - basically blades you can "grow" with, since they work well with many rubbers. And they don´t cost a fortune.
As for rubbers, often classic rubbers like Sriver, Coppa, Vario and the likes are preferred. This makes sense, although you may also go for a moderate tensor rubber, if you don´t overdo it on sponge thickness.
With classics, you should start with a sponge thickness of at least 1.7 if you ask me, as anything thinner is limiting. This is not to say you cannot learn table tennis with a Friendship rubber in 1.5 mm, but that doesn´t suit the modern game quite well.
One more topic of discussion is whether you should use different rubbers for forehand and backhand, or at least different sponge thicknesses. Most people have a stronger forehand than backhand, so to them it makes sense. The beginner doesn´t know where the journey might be going, so picking a slower backhand from the start doesn´t make sense to me.
As we partner with Tibhar in our club, a typical setup for beginners would be the Samsonov Premium Contact blade with two Rapid rubbers in 1.8 mm. We are giving this to children (unless the hands are so small they need a kids´ blade first) and adult beginners alike, and once they make good progress they can pick their next rubbers accordingly. As these Rapid rubbers are pretty durable, they can learn for a good while before the rubbers are worn out.