I disagree with what the previous guy said. If you want a personal brand and you are willing to play the long game (which is necessary) listen to me lol.
I have probably used that amount over the past year. Spend some time getting info and spend that 1k over a long period of time. Personal accounts take a long time to make money. I started 9 months ago and I have one 30k account and one 9k acount. Id spend that on great content first and formost. Then get a bot like Jarvee or GMT, but not to bot - to gather data from. Don't ever switch your acc from business because you will need all those statistics.
You should have at least 9+ posts before botting. I recommend ONLY using it to like other people's photos, one per person, from other good/large accounts in your niche. Do it slowly, never faster than 15 seconds per like. Do like 1 -200 a day for a few weeks. This will get some traction do you account. Increase by like 50 or so each week until maybe 500. At like 4k I would say to stop botting (but keep gathering stats). Focus, focus, focus on making great content and stay on top of the algorithm and always be learning. Use stories alot and engage with your followers.
OFC, all this is a waste of time if your content is bad though so that's all I'll say for now.