The great thing about the AI world - is everything diffuses out quickly on the "For You" timeline - and then you can add people that you are interested in (which reinforces your interest in AI).

Some bootstrapping accounts might be @rosstaylor90, @rasbt, @karpathy, @ID_AA_Carmack, @DrJimFan, @YiTayML, @JeffDean, @dustinvtran, @tunguz, @fchollet, @ylecun, @miramurati, @nonmayorpete, @pmarca, @sama.

These are definitely not an authoritative list - just some of the AI names I follow - but, honestly - if any relevant news breaks - your timeline picks it up within minutes - so you just need a good random sample. Your interests will diverge and you'll pick up your own follows pretty quickly.