The one I settled on was Notes Plus. There are several apps that will use OCR to make your notes searchable, but that was the only one I could find that would actually convert your notes to plain text. That's handy in case you want to send your notes to someone else, but don't want to subject them to your handwriting.
Other options I investigated were:
Microsoft One Note
Penultimate
Notability
GoodNotes
All of these are good options, and each has their strengths and weaknesses. Take a look through their features and see if any of them have something that appeals to you.
Bought this app also . UI very intuitiveNotability is the one I use most, excellent with Apple Pencil, you can also type, record audio. I haven't had Nebo long but I like it, the handwriting conversion is excellent.i use Apple notes for shopping lists and other quick notes. There are heaps of tutorials for the major note apps on YouTube, check those out rather than buying and trying them all.