Newbie needing pattern help please

Hi everyone
really sorry if this has already been asked, but im really new to knitting I have done 3 bears so far and want to move on to doing a cardigan now and have my pattern wool and needles but really don’t understand parts of the pattern.

I’ve done the first part of the pattern which is 8 2x2 rib but then says Rib2tog (rib 12 [8:8:8:12:10]
is rib stitch different to 2x2 rib? how do I rib 2 together?

sorry I really am clueless and in need of basic ABC please

Big thank you