How to set a dual-boot installation with two hard drives (SSD and HDD)

I'm about to format my PC with Windows 10 and I would like to install a system with Windows 10 and Ubuntu dual-boot. I have already done that in other occasions, but this time is different.

I don't know how to set my Linux partitions correctly so what I usually do is using the automatic tool in the Ubuntu installation process. It has worked for me over the past years whenever I tried to install Linux.

This time, my PC has a SSD (120 GB) and a HDD (1 TB), currently with Windows 10. I use the former to boot the system and store the most frequently used software, and the latter to store music, photos, videos, games, etc.

My intention is to install both OS so that they both boot from the SSD and have a minimum storage in it, while using the HDD for storage in both OS.

I will be using Ubuntu for programming, so I might not need as much space in the HDD. However, I will be using Windows for PC gaming, so I'll need more space there.

I don't mind deleting all my current data, since it's already backed up online. I would even prefer to delete all, since I want to clean my current Windows installation.