How demanding is a Bachelor's program?

I'm only in community college now but am looking at schools for a Bachelor's. I might be able to transfer credits and get a Bachelors in 2-3 years. What should I expect coming from a CC? Also, is it a foolish idea to double-major or can it be done with lots of ambition and focus?

I feel hopelessly lost and there are 1 million questions about an ultimatum.

How demanding is a Bachelor's program?
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