Making Pi as personal VPN and want to access in from outside

Namaste Friends,

I want to make my Pi as personal VPN and want to access it from outside
home network. My Pi is connected to internet (BSNL Broadband) 24X7 having
dynamic IP address.

Can I make it as VPN so that I can access it from outside my home network?

What steps do I need to follow or changes have to make to access it from
outside/another network?

Is it possible to access it from outer network while having dynamic IP
address from my ISP?

Before jumping directly on this forum I have done bit of googling and found
these two links and had gone through. Didn't execute the solutions
mentioned in the links so far.

http://lifehacker.com/5978098/turn-a-raspberry-pi-into-a-personal-vpn-for-secure-browsing-anywhere-you-go

(this link may have some non-open source software so kindly exempt me on
that part)

http://jamesslootweg.com/view/Using_your_Raspberry_Pi_as_a_VPN_access_point

I am trying to explore different avenues for the same if exists that's why
seeking genuine advice from learned folks.

Please illuminate me on the same.

Thank you.

-- 

*Regards,Sahil ModGill*
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