Custom ATMega328p all in one sensor display board

So Im designing this circuit with an ATMega 328p, a HX711 load cell amplifier and an i2c oled. It also involves a lipo charging and 5 volt boost circuit.
So far i have created the schematic and now i want to know if it is any good (especially the VCC and GND flags i used), or if i made major mistakes.
As this is my first projekt involving a custom pcb and schematic. Im using easyEDA at the moment. (because of the easy to use library manager, and many parts available)

Thanks for any advice.