There are more people here who's first language isn't English, no worries.
You can do that on Linux too if you want, just select one drive you want to install your os on and then once the os installed you can format the your second drive to for data, that is if you let the system do an automatic partitioning for you. Then you can mount the second drive on a second location, ie: /mnt/Games. Or you can choose to do a manual disk partitioning during installation and then use the first drive for system partitions and then select your second drive for /home partition where you then can store your drivers and personal data.
If you want to combine them you can either use an lvm setup during installation or you can use btrfs, being you are using Nobara I would do the latter. I haven't use the Nobara installer so I wouldn't know off the top how to do that. However since you are new to Linux I would just keep them separate for in case you needed to reinstall, that way you won't have to wipe all your games again if you want to to reinstall your system. That being said going back to what I said first. I would do the following if I were you.
1. Do an automatic partitioning during installation during the install process and select your first disk.
2. After the installation, you can format and mount your second disk to a location for your gaming library, ie: under /mnt/Games.
In case you mess up your system, you will only have to wipe the first disk and if you have any personal files on /home which is then on your first disk, you can then just copy them to your second disk in a separate directory. Then you reinstall, mount your second disk again and copy your files from the second disk back to /home. But do whatever is better for you and what you want yourself. Just giving you several options here.
