I listened to your advice and made the diagram using draw.io also I now want to use this thingy to run OPNSense in bare metal instead of virtualizing it: https://www.amazon.com.mx/gp/aw/d/B09H6WCX41/ref=ox_sc_act_image_2

I stress tested my server using y-cruncher and this is the result: https://pastebin.com/raw/rKG2mkd8

I want to learn sysadmin stuff and run some services for me and my family but the main reason for this is experimenting and keeping myself busy.