Hi,

You will be able to continue to breastfeed just fine, and your school should support you. Re feeding solids, leave it til 6mnths, and then you start - get the photos taken of "the first solid feed" for the family album.. But, believe me, the novelty wears off.
The best investment you could make are two booklets from the Australian Breastfeeding Association - "Breastfeeding women and work" and "Expressing and Storing breastmilk" And a subscription would be a great idea for yourself as well.
From personal experience I returned to full time work as a secondary school teacher when my firstborn was 6 WEEKS old and he breastfed until he was 4! I won't pretend it was always easy, but it was doable, and definately easier after 6mnths

Warm Regards
Barb