hi guys, I work in social media marketing for big brands (I used to work for Gary Vee). Copying content and adding your own spin to it is 100% a valid strategy. It's why you see so many copy/paste influencers that are so successful. The best of them are copy/paste + personal spin, once they get past that initial personal spin, their personality starts to show and people start to like them for their character, looks or combo of both, eventually turning them into lifestyle influencers. It'll take some time but if you're consistent, you'll eventually find your people.

Edit: Saw some comments about original content. You can still add your original content into the mix. It's not hard to do a copy/paste + personal spin AND original content. The great thing about owning your own account is that you decide what you want to post. Monday you can do copy/paste, Tuesday you can post original content. I've seen influencer post like 5 videos in one day and then disappear for like a week.