Is “instead, you look at different styles online you make your choice” a run on or a comma splice?

In the sentence "Instead, you look at different styles online you make your choice." I would say it is a run-on sentence.

It is a run-on sentence because Instead, you look at different styles, and online you make your choice are two independent clauses.

Hope I helped :)

“way of writing” should be replaced with “writing style"

“idea” should be replaced with “purpose.”

maybe   “people from a long time ago” should be replaced with “elizabethans.”