[1v1] USF v OKW

Hey guys,
It's been a while since I played. So I warmed up on a couple of easy AI games and I thought I was ready.
Then my opponent get OKW. I've never used seriously or played against OKW, so I'd be behind on tactical decisions, besides my new(oo)byness.

The replay speaks for itself, but some points:

1. He spammed so-so infantry units. I don't know if Riflemen can trade against Volks, I tried sometimes, but his swarm was better than mine, I couldn't keep the pressure. I don't know if as USF I could, probably yes, but notice I'm a beginner here, anytips are welcome.

2. He focused on my fuel, I couldn't quite get it. My Stuarts were delayed, I think I did a good job, but it was so delayed that he got heavy armor while I couldn't afford a Sherman. I got a major, but the whole game I couldn't reach for shermans. Probably I shouldn't have got that second Stuart. What do you guys think?

3. My AT drop... What could Ive done?

4. I really couldn't keep the pressure. Sometimes I did, sometimes it worked well. But since I was fighting from behind on the map, I wasn't sure where I could put effort to conquer. I tried to scout leaving a unit here and there, but I wasn't sure. Any major hints here?

I think that's it. Any input is really helpful guys. Thanks a lot =)