Welcome to the forums!
You will find that you use Old Faithful often, so if it is really rough, you should spend time on it. No matter if you consolidate more or move on, if it isn’t right, you will want to keep it in your practices until you are happy with it. I used the Nitsuj sessions as my guide many times.
this is not the official method, but it has been ok for me so far:
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When I have a collection of technique practice elements that makes my total time too long for my available time, I stop there until I can take a few elements off practice. This gives me a chance to keep things that are slow for me to learn, and I can still move to new material when elements are fast to learn. A really good example is that I have had Barre chords on my practice for months, but I am many modules past the lesson.
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Another case where I may need to stop is when I want to learn a song that uses something I cannot do yet. I’ll add a little more time with the song which takes time out of my formal technique element practice.
You are adding singing. I do not sing and not sure I will try. There are a lot of postings about singing and I recommend you use the search feature and see if you can get a feel for recommendations there if you don’t see anything here. I kind of feel like it should be treated independently early on because thinking about singing while learning to do something complex with your hands is tricky. Conventional wisdom is that you need to be very comfortable with independently playing and singing, then combine the two.