mesa 7i96 connection refused

So i am running a mesa 7i96 card for my plasma machine, the mini pc i was using took a crap on me so i am trying to set up a new tower but i am getting a connection refused error when opening my configuration. I found some older posts that said to check the results of ip a and it shows my ethernet connection is enp3s0 but the ip address matched the card at 192.168.121.1. so i changed the jumpers to 10.10.10.10 and set up a new test configuration with that ip. now when I run ip a under enps03 it shows 10.10.10.10 and i get the same connection refused error. I have gone through every single tutorial on the internet on how to change to a static ip and i cannot get it to take. If i pull up my network directory to edit it enp3s0 is not even there only one entry for loopback. i tried adding the enp3s0 in the format of the hm2-eth manual and nothing happens. i am running a fresh installation of debian buster downloaded from the link in the plasma c userguide. any ideas would be greatly appreciated ive been staring at this screen for 12 plus hours and have gotten nowhere.

Also i am able to ping the card successfully if that information helps.

changing the pc is what i am having the issue with, it wont seem to take the change. where do you suggest i change it at? when i run /etc/network/interfaces the ethernet does not show in the list, i tried to add it but it changes nothing.

Here are some screen shots of when i run ip a, /etc/network/interfaces and of the error when opening my machine. At first i posted the wrong image of the error code but i edited.

You cannot source the interfaces file, its not a script.
Its executed when you bring an interface up or down.

Pardon my ignorance but i dont know what that means, what do i need to do to fix my issue?

Adding this to your interfaces file should fix it:

auto enp3s0
iface enp3s0 inet static
address 10.10.10.100/24

Then set the interface up with

sudo ifup -a

Then verify that it worked by running

ip a

Did i put it in the right place? (attachment) i did the sudo ifup -a and nothing took, did sudo if up enp3s0 and it said network already up, tried down them back up and still nothing took.

If i type ip a with the mesa card powerd up i get

2: enp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether f0:4d:a2:fe:86:3e brd ff:ff:ff:ff:ff:ff
inet 10.10.10.10/8 brd 10.255.255.255 scope global enp3s0
valid_lft forever preferred_lft forever
inet6 fe80::f24d:a2ff:fefe:863e/64 scope link
valid_lft forever preferred_lft forever

If i do it with the mesa card off i get

2: enp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether f0:4d:a2:fe:86:3e brd ff:ff:ff:ff:ff:ff
inet6 fe80::f24d:a2ff:fefe:863e/64 scope link
valid_lft forever preferred_lft forever

Could you please copy/paste you interfaces file here

If the interfaces file does not take, it usually because there is a error/typo in the file