I'm glad to read you are well researched and money wise, you would be surprised how many people think they can set off just with a passport and credit card.
I'd double check on all the Visas you need simply because countries change their conditions to travel for different nationalities sometimes without warning. Oh and just keep a note on where you can pick up any Visas you need on route.
When I traveled to India the Visa was from date of issue for UK citizens single entry for 6 months but check this.
Think yourself fortunate you are not applying for a Russian Visa.
My son as worked in a number of countries but not Australia with the contracts arranged in England. He is at senior level in security so doesn't have any problem as companies are paranoid about hackers.
I wouldn't have thought you would have a problem, having a job arranged before you go would be a plus, you might even be able to arrange this in the UK.
I'm glad you found the link useful here's another one for independent travelers.
If you want to meet locals when you travel check this one out.