When I removed the seeds, I placed them in a small container. The next step was to drain the liquid. I did this with a strainer, gently letting it drain completely, leaving only the seeds. Once they were drier, I put them back in the container for the next step.
Next came the most important step, which I was advised to take when I asked: leaving the seeds in the sun as much as possible. So, I left them to dry for two days straight. As you can see, they decreased in size, and I think the number of seeds also decreased, but they were very dry and ready for my seedbed.
It was just a matter of finding a container deep and large enough for the future plants to grow well. Once I found one, I covered it with a little soil and added a little water. Then, with my fingers, I made small furrows where I placed the seeds, making sure they were evenly distributed, before gently covering them with soil. After that, it was just a matter of finding a suitable spot where animals and humans couldn't damage them, and then waiting for nature to do its work so that I would have some tomato plants growing from the seeds.