While working on my project I gave my RC plane's nose a particular shape. It doesn't resemble any simple shapes for which coefficient of drag is provided on Internet. I don't know simulations. Also I don't have any wind tunnel facility for my project. So is there any other way, any website or any formula for computing coefficient of lift and drag?
There are essentially only two ways to do this.
First you can build a wind tunnel, run experiments and measure the forces involved.
The second is to run a computer simulation. There is software that will do this, but it is complex professional grade engineering software. Free applications are available, but I can't vouch for their effectiveness. You can search for "computational fluid dynamics software" to find options. Adding "free" to that will find you a few cost-free options.
Be aware that setting up and using this software is a complex task that involves creating a CAD model of your shape. You can definitely do the calculation if you are interested, but it's not a simple or quick task.
If you just want answer, use wind tunnel. If you want to calculate the answer, you must solve Navier-Stokes equations, with boundary conditions established to represent the shape in question. This is done using numerical analysis and is an advanced mathematical process involving complex analysis (by which I mean meaning using complex numbers and complex functions).
As mentioned in another answer, there is software available that does much of this for you.