Hello aspirant,

With 80% in CBSE board, a general category student cannot expect to get a good college in Delhi University. You can get into evening colleges with marks in this range.
However if you want to study progressive courses in good colleges, you may try getting in by entrance test.
There are few courses which take admissions via entrances. Management courses like BMS and BBE are booming. The entrance test is simple, I myself tried a luck at it and ended up getting a 492 rank. It comprises of aptitudes, reasoning, literary and general knowledge section. Best of luck with your decision.

Hope you understand,
Thank you