The more I read the replies from you guys, the more I realized the importance of developing hand independence. It's a valuable skill that I think in the long term will not only help in playing 1 hand softer than the other but also help in many other ways.
p2u_ - Thank you for the video and quote. I agree with you from the start about the importance of the musical content itself and the importance of the 'interaction' of LH and RH. But like others pointed out, I think I have to get over the technical difficulties first before I can play the way I want it to.
cjp_piano - All right I'll try it!

j_menz - Aren't the inventions a bit too difficult? (I am grade 3 ABRSM) I have played 2 or 3 pieces from the notebook before and a prelude from Bach.
ajspiano - I very much agree with you and could also relate to the experience of your student. There is definitely a compromise between dynamics and playing the piece correctly. If I focus on 'feeling' the piece and the dynamics, I would be really engrossed to the music and end up 'reading' less on the notes and end up making a lot of mistakes. If I focus on getting the notes right, I will play too carefully and compromising much of the dynamics. As for now, I think I should solve some of the more technical part of my playing then focus on the playing later. Of course ideally I should be able to do both, but I just think the technical part is more of a problem to me now.
Actually my family complains a lot about my playing too. Like my scales are really noisy (I actually agree, because the piano is very loud and it's in the living room, I use damper pedal now whenever my family is watching TV or finds it annoying), they also complain my playing is horrible etc. I wasn't discourage by what they say though, as an adult, I think I can handle it better than I could if I was learning it at a younger age. I am lucky that I have tolerant neighbor though.
scottmc - Thanks for the clarification. I actually think I saw a video before illustrating this technique. I should look up the Liszt exercise that you mentioned too.
Anyway, I tried to record my playing yesterday. It will be a bit painful to listen to as I make a lot of mistakes and I still could not play it well yet

. But I hope gives you an idea about what I'm talking about. I actually think this time around I was able to play LH softer than I usually do, but tell me if it's still too loud. I know there's still much I need to work on this piece, but feel free to comment about anything else other than the speed too.
Here's the recording:
https://www.compoundtime.com/Jovensky/entries/10754Just click play from the page.