Your JEE Main rank of 1839 (79.44 percentile) in OBC and 5628 in General category can get you possible engineering colleges. In case of B.Arch, you have a rank of 6003.

You may want to look into colleges which have admitted ranks similar to yours in the past years. State level colleges or the private ones may be some of the alternatives.

To have a closer look, you may visit the college predictors or counseling tools, which are offered online. They will facilitate your access to tools that will enable you to estimate your chances of joining particular colleges depending on your rank and preferences.