I also have the complete lyric pieces from Schrimer. I think it's a good edition, my only complaint is that the book won't stay open easily.
I would keep in mind that even though 23 feels like an old age to start - you do actually have a lot of time ahead of you, all going well. It is best to get good foundations - and a good method will give you a system for developing technique and reading. I would stick with these.However, you are also an adult with intellectual ability far beyond what some of these systems present. With that in mind, you will be restless to learn something that feels and sounds to you like 'real' music - basically this means that it comes from a recognised composer, when you work it all out, little more than that. However, it is this motivation that drives us to learn and practice.Don't bite off too much at once - fast track through your lesson books, but organise the pieces you want to learn. These can also speed up your learning while you are laying foundations. The WTC is pretty much grade 7 upwards - and you can get Prelude 1 for free. So don't get this one yet. The Anna Magdalena books have a few fairly simple and lovely pieces - and most of the pieces are quite pleasing. They are between grades 1 and 4. Try the Minuets. They are nice and they are logical. I would suggest trying to get through this book and your method book/s in the next few months and then you might be ready for grade 3 pieces - which opens up more Beethoven Dances and other short Classical works. But, listen to your teacher - they are there to help and guide you, and hopefully to fast track you as an adult. Value the work you are doing now because it will make harder work more accessible sooner.
However, you are also an adult with intellectual ability far beyond what some of these systems present. With that in mind, you will be restless to learn something that feels and sounds to you like 'real' music - basically this means that it comes from a recognised composer, when you work it all out, little more than that. However, it is this motivation that drives us to learn and practice.Don't bite off too much at once - fast track through your lesson books, but organise the pieces you want to learn. These can also speed up your learning while you are laying foundations. The WTC is pretty much grade 7 upwards - and you can get Prelude 1 for free. So don't get this one yet. The Anna Magdalena books have a few fairly simple and lovely pieces - and most of the pieces are quite pleasing. They are between grades 1 and 4. Try the Minuets. They are nice and they are logical.
I have learned the Bach prelude too that you had on your blog. But I need to learn the ending