Design student aiming for CAT + MICAT — Help!

Final-year NIFT student here, planning to take CAT, MICAT (maybe GMAT too).

I haven’t studied math since 12th. Is it realistic to crack CAT + MICAT without coaching, using just YouTube and mock tests? Anyone from a non-engineering background who’s done this?

Also looking for free or budget-friendly resources, especially for Quant and MICAT’s creative sections. Any tips or experiences would be a big help. Thanks!