Sponsorship is highly unlikely as is getting into a UAS unfortunately.
If you go down the Modular route of training expect to spend about £50,000. Start by spending £5,000 on a PPL over the next couple of years - see if you like it and have any aptitude for it.
Then I'd forget University with its crippling costs. Get on something useful like an engineering based Modern Apprenticeship, get earning a wage, live at home, save like whale and aim to get a CPL IR Frzn ATPL by the time you are 24 and not be in any debt.
Hard work but then anything in life worth doing usually is.
Good luck,
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