Long way to go!

Hello all,
I am almost 20 now and m looking forward to lose at least 5kgs before feb ends.. As a birthday gift I wanna give myself!
Please suggest n guide me as due to certain issues I cannot go to d gym n need to exercise at home
My current weight is 86.7kg n height is 155cm. My ultimate goal is to lose 36kgs!
I have jus began this journey so would be needing a lot of tips!