This is pretty much of a duplicate of the answer to the linked question. There is no difference between provisional and non-provisional applications is this regard. But I woud take a "may" more seriously in a nonprofessional.
The rules address paragraph numbering in 37 CFR § 1.52
paragraphs of the specification, other than in the claims or abstract, may be numbered at the time the application is filed, and should be individually and consecutively numbered using Arabic numerals, so as to unambiguously identify each paragraph. The number should consist of at least four numerals enclosed in square brackets, including leading zeros (e.g., [0001]). The numbers and enclosing brackets should appear to the right of the left margin as the first item in each paragraph, before the first word of the paragraph, and should be highlighted in bold.
It is optional but recommended for ease of specifying portions of the specification that might end up needing to be amended. It is easier to say, "substitute X for the following text starting with the third line of paragraph A", than without line numbers.
I do not think anything bad will happen if you use line numbers instead. I can't find any mention of line numbers in the MPEP. My guess is that before word processors and computers it have would been very difficult to produce the line number format with a typewriter so the format suggestion was line numbers.
Either way of numbering is a click away in programs like MS Word so I would suggest doing the suggested thing.