Mental illness in hubby help

My husband might be bi polar.. I’m really not sure. He gets angry about the dumbest things and it feels like I’m walking on egg shells most of the time.. I’m not scared of him or anything and I tolerate his anger pretty well. He just gets really pissed really fast. Anyways I’ve noticed today especially he will go trough these spirts of wanting to do something with his life to make it worth while. He has been really unhappy doing collision body work on cars. He want to do something amazing with life which I’m totally all for but he’s 32 and has no other bake ground other then mechanic work.. is this like that grandiose shit they talk about with no polar people? He wants to become something super idolizing like a professional football player or a mega model.. Just stuff that really is rare.. is this mania?