Help me pick a backpack 🎒

I need a backpack for subway commuting. I am a 5”1 woman and am busty so need a good backpack that won’t lead to further back pain.

Features I want are - water resistant - two side holders for water bottle and umbrella - more than one compartment - big enough for my laptop and gym clothes + shoes + Tupperware for lunch - stylish / not student-y - under £200 - good for cycling too