Travel while you’re young and able. Don’t worry about the money, just make it work. Experience is far more valuable than money ever will be.
It can be a minefield trying to figure out what vaccinations you need. And this is more difficult when you don’t know exactly where you’ll be travelling to.
The first thing you’ll need to check, is that your standard vaccines for life in Britain are all up to date. You can find general info on vaccinations for India on the NHS’ fit for travel site.
NHS Choices provide good information on what you can get for free and what you’ll have to pay for. Here’s the summary: