Getting admission into RVCE or BMSCE is a bit difficult as they are on the top 1st and 2nd colleges in Bangalore, almost all students will want to get admitted to one of these colleges.
Write CET and COMEDK and try to score well. You might just get lucky with your rank.
or else Management quota is the only option. The fee for your preferred course might be high but the seat is assured. Management quota students are treated the same way as any other quota, in fact, no one knows how everyone gets into the college.
my suggestion would be to get an education consultant’s number and proceed ahead. They will guide you and give you options that you wouldn’t know about.
Don’t worry about being an average student, if you really want to something in life it will always find its way to you,
Good luck