@PVarshini Modest or not its your scope and i bet you know how to get the best out of it. I was looking at the picture and i don’t see a diagonal. Are you using it straight thru? As it has been said, once you get past the gas giants the planets get a bit on the small side, even in the 16 inch Neptune all i have seen is a small ball with a couple varying shades of blue. Once i think i might have caught a bit of clouds, but it was there and gone so fast i am not sure what i was actually seeing.
You scope will be great for the brighter deep sky, double stars and open clusters. 140x will be about your max power on any given night.