What rubber?

• im not a pro table tennis player but what rubber should i buy a thick kind of rubber or a thin one and what do you think is a good rubber

Rubber is very much a matter of preference.

The thicker the rubber the more spin you can generate and to some extent you will lose some control.  So to start with use a thinner sponge until your strokes are well developed.

With any of the brands of rubber go for something that has good control rather than speed or spin.