Ok so I think a couple of things from watching the video that will help you are these:
Trying to stay loose and relaxed in your shots, you can see that sometimes your upper body and arm is tensing and tightening especially during the contact. this makes it hard to generate spin and have maximum control, so try to keep relaxed and smooth strokes on both sides. One thing i noticed with your pushing is to be sure to stay low and step into the table more, this will help keep the control when pushing. Especially when the ball is shorter in the table.
Working on a good topspin against a backspin push, this will help you get into the open rallies more often and a lot of people struggle to block the ball if you can get good spin against a push ball. Also by being very solid in the pushing rallies will help because then you don’t feel rushed into going for an attack too soon and making mistakes.
I saw as well quite often that your right foot ends up in front of your left foot, this makes it difficult to play forehands in a comfortable position and also difficult to move over to the forehand corner which you can see in this video gave you some trouble. If you can try to always keep your feet parallel but with the right slightly behind the left this will help you a lot! I will make movement easier and help your forehand feel less tense.
Lastly I would say there is a lot of good stuff in there too for only playing for 3-4 months, very impressive and I think with work on these areas you’ll see a good improvement!
