You will know when it is too much. I would try not to exhaust yourself today so that you cannot practise tomorrow.
You can practise yoga whenever you have an empty stomach so you have plenty of opportunities. It is nice to be regular.
If I were to split it up during the day then perhaps I would do it like this:
Sun salutations and standing postures in the morning
Sun salutations before lunch to stimulate digestion. Baddha Konasana and Virasana are good for after lunch. They are, I think the only two postures recommended for a full stomach.
Evening - seated postures and inversions to refresh and prepare for tomorrow.
End with some meditation before you eat.
How is that?