Total newbie looking for advice please

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i did quick forum search , seem have confused myself.
i have been given unused nano 328 , want able read values temp/humitity/ barometer module , display them on 16 x 2 lcd display want unit end self contained , able run off usb power bank portable use.
sensor used bme 280 module , display hd44780 unit gifted me, , power bank supplies 2a on 5v usb output ( used android tablet)
i happy electronics construction side of things , have managed work out pinouts display , sensor, getting confused on nano side of things.

sorry if seems have rambled on bit

it doesn't matter arduino have.

start small, try of example programs come arduino ide (blink without delay, etc.), learn read module, learn use lcd, , put them together.

in order.  google great in finding tutorials.


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