Yes dear , you can definetily get in good colleges through KCET . having a good hold on the concepts will help you to good in KCET 2020 exam. If you get good rank in KCET then you can surely get in good college although you belongs to general category . You should target to get more than 150 marks  out of 180 to get admission in popular colleges .

You can also check the previous year cutoff of KCET :

https://engineering.careers360.com/articles/kcet-cutoff

Hope this helps !!