Hello aspirant

With 43 percentile , your expected all India rank will be 485,335.7

your jee main rank is very less. Even with obc category or sc category, you will not get CS branch.  2019 Jee main cut off

General category.     89

Obc                              74 percentile

sc category                  54

st category                    44

2019 cut off , b tech in computer science in techno India Haldia

Category                      cut off  by rank

general                                  5142

EWS                                         5142

For more information, you can refer following link

https://engineering.careers360.com/jee-main-college-predictor