The £35,000 requirement is only what you need to be earning by the time you reach 5 years on a work visa and want to apply for ILR... Although for people applying for ILR 5 years from now (in 2021) this income threshold will have increased to about £38,000 and will likely keep increasing.
I don't think you should be worrying about this, since for you, it would be, almost 10 years from now before it would even apply to you. First you have to get through, say, a year of college, then 3 years of university, then 5 years on a work visa.
At the moment, to qualify for a Tier 2 General work visa, you only need to be earning £20,800... Though this is also likely to increase over time.
I would imagine that you will be able to qualify for and switch to a spousal/partner several visa years before that - which only has an income requirement of £18,600 at the moment and if you are living in the UK with your partner on a visa that allows work, you can combine your incomes to make £18,600 anyway.
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