This is a beautiful song and you performed it quite meaningfully.
I think that since you are now focused on a studio type of recording, you can take advantage of this type of technique. I mean, today at studio an artist does not record his part all at once. Each line can take a lot of takes. For this type of work I use Magix Samplitude. It’s easy to connect the PSR to a computer with an audio cable and to record instrumental parts and vocals separately. It’s also easy to make basic editings. .
Also, I use closed headphones to record the vocal. It eliminates the feedback noise.
I believe that it can be a useful tool for you. On the other hand, if the method you’re using now suits you better, it’s great too.