You can use Tik Tok and autopilot faster. Both platforms are quite good. Use big data to tag and find the right person according to your interests and products. The specific operation is to make your product into a small video, release it constantly and accumulate fans. You should continue to add people of this age, pay attention to them, and then the system will match them to people of your age. When you have accumulated dozens of fans in their forties, you will basically have a label, and sending short videos continuously will be effective.
There are many people in their forties in the same city. Look for them in the same city and keep an eye on them. They will also pay attention to you. The system will label you and classify you. It will become easier and easier after doing this.
I hope I can help you, I hope I can adopt it, and you can ask questions if you have any questions.