How do I get from Paris Beauvais Terminal 1 to Lille?

Hello!
I'm arriving at Paris Beauvais Terminal 1 at 8am on the 1st of September and I need to get to Lille by train or bus.I just started studying French so if I can book any ticket in advance it would be reeeeeeally helpful.

Thank you!

Please help=(
Update: I'' m flying from Bulgaria and the only convenient and cheap flight was to Paris Beauvais Terminal 1.That's why I'm not flying directly to Lille and need some train or something to get there=/
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