I would like to install nethunter on my phone, please help.

Let me explain the situation.

1. my phone is Nexus5 D820

2. twrp-3.7.0_9-0-hammerhead.img is already installed

3. this custom ROM is installed now https://doc.e.foundation/devices/hammerhead

4. I downloaded this nethunter-2022.4-hammerhead-nougat-kalifs-full.zip

5. I downloaded Magisk-v25.2.apk

6. I copied nethunter-2022.4-hammerhead-nougat-kalifs-full.zip and Magisk-v25.2.apk to Nexus storage already

Could you please give me the exact steps after this in detail and in order?

I've tried a lot of things on my own and it didn't work.