Asalam o Alaikum!

I own Nikon D5300 with following lenses and accessories.

1) Nikon 35mm 1.8G
2) Nikon 18-140mm AF-S
3) Nikon 70-300mm AF-S VR
4) Yongnuo Speedlite YN565EX (external Flash)
5) Wireless Remote
6) Tripod

I intend to take my night portraits with "BOOKEH" effects on the rooftop of my house. I'm posting some pictures here so that you guys can understand what kind of portraits I want.

1) night portraits - Google Search

2) night portraits - Google Search

3) night portraits - Google Search

4) night portraits - Google Search

5) night portraits - Google Search

I hope you all must have understood what I'm trying to explain! Please let me know the correct steps and guide me if I should invest in a light system/setup or any special lens for these kind of photos?

P.S There would be no one to help me whilst I take a portrait of my self so please bear that in mind that I have to do all the work myself.

Waiting for your kind reply.

Thanks.