I thought the same thing about the mods, that they didn’t work. They’re temporary and only work while in combat. When you’re in the game, you want to start the trainer and then when you’re in a combat mission you’ll use the keybinds. Press tab to pick a character, you’ll see their health on the left hand side. Pressing 1 on the numpad (if that’s the button you have mapped) will adjust the health to 100. Pushing it again will raise it to 200, etc. The same thing will happen for attack except I don’t think there’s a spot that will show that. Now when you hit tab again, pressing 1 on the numpad will show up 300 since 200 was already input and is shown in the mod window.
I hope this helps, I was lost too when I started playing but it was getting the mods to work that motivated me to grab the season pass cuz this game is a lot of fun with the mods and being able to sweep everyone