There are various ways to make money online, and while earning $1000 can be achievable, You can pursue that in 2 different ways:

Choose any one from the following:

Freelancing: If you possess a marketable skill such as writing, graphic design, programming.

Affiliate Marketing: You can promote products or services on your website, YouTube channel or Social Media channels

If you are not sure what you will be more suitable for, do a self Analysis through a Psychometric Test, which will ensure your suitability for Freelancing or Affiliate Income