Changing Solo Performance Piece

I have decided to change my second solo piece. After thinking long and hard about it, I have decided to change 'It's so Easy' to Vintage Trouble's 'Not Alright by Me'. The reason for this is that 'It's so Easy' is quite a simple piece, which doesn't challenge my ability. I find that the song is much more enjoyable, and fun to play. 'Not Alright by Me' uses finger picking, with the exception of regular picking during the solo. This means that I will have to learn how to play in that style, which is very different to my normal style.  The piece means a lot to me, the message behind the song and memories connected with it make it a perfect song to choose. The piece isn't as stressful as 'Sultans of Swing', it is much more relaxed and fun to play.
I have already started learning the song, using the TAB seen below:

I am making much more progress than I have with 'Sultans of Swing', possibly because I have more of a passion for the song. I am making progress more progress than before with my piece now too. This is because I have been practising each phrase of the song one step at a time, learning each fill fully before moving on. As a result of this, I can confidently play along with the original track.
One weakness I have spotted with the track is my inability to play in time with the rhythm. I have been working on this, but need to look at the music each time I play which isn't ideal as I'd like to have the piece memorised. The difficult thing with 'Sultans of Swing' is that there is so much to remember - there are so many unique fills and two very different instrumentals.

Good progress is being made with 'Not Alright by Me', I have learned how to play the main portion of the song, which is a new style of playing for me as it requires two strings to be played at the same time. I had never played a finger-style piece before learning this piece, but it is a good challenge and I'm excited to see the outcome. The solo in the song is fairly simple, there are a lot of hammer-ons and pull-offs, but I am very used to these, as I tend to warmup with AC/DC's 'Thunderstruck'. There are a few complexities in the solo, but they aren't anything to be afraid of. I am confident with the piece so far, and hope to learn the piece roughly in a few days - leaving a good amount of time to perfect the piece in time for December.