hi my bubs is 4 months and ready for food - i ...

hi my bubs is 4 months and ready for food - i have been giving him a little pumpkin at around 5pm but now feel he needs more. When do I give him solids? what do I give him? how much? and what is the order with feeding him the bottle too - do I feed him the bottle then give him tea/breakfast? what do you do? thanks heaps lots of love xx