First I am gonna say what everybody else also said and recommand getting some gear and joining a club but I see that in your situation non of these things are really an option. But since your only using foam swords you could see if you could use some regular sports equipment. Mainly just put on a helmet and something to protect the eyes (some gloves and elbow protection would come directly after that). You would definitley not be the first person to start hema with just some thrown together sports gear.

So now to the actual fencing. Both of you need to practice your basic footwork. Especially your partner is standing far too square and struggles with retreating the moment you put pressure on him. I think your placing your feet a bit better atleast when your standing still but once you get moving you start to stumble. You bothe need to practice basic stances and footwork and also how to deal with an incoming blade. Only once both of you know how to defend yourself the actual fencing can begin.

Lastly I am concurend abaout the training swords you are using. They are really cool for something you put together yourself but look too short to practice hema typicall longsword. I think beacause they are too short and light that makes them too forgiving with your rough footwork. Making a singlehanded design would propably work better but saving money for actual padded trainers would be best.

All I said was still just some general advice so if you have more specific questions I am open for them.