Steps:
1. Get a second job or a new job. Perhaps you will need to study something to make that happen. Your income is very low for US standards and you will not be able to support a future spouse (never mind also proving your ability to sponsor an immigrant and handling what you owe for your current child(ren) you are responsible for).
2. Pay back your child support.
3. Apply for a passport. That takes a few months. You also can not sponsor an immigrant without a passport (or without meeting them).
4. Save up money to travel to Kenya.
4. Travel to Kenya, not just once, but multiple times. Get to know this woman, her family, etc. You do NOT know someone unless you spend time with them face-to-face. Anyone can appear "amazing" online.
5. Apply for either K1 or CR1 whenever that time comes. Timeline would be about 2+ years to get to the US (by today's wait times, which are increasing).
Or, as stated above, tell her you would like to move to Kenya. If you truly want to be with her, that will be your easiest solution. Also, Kenya is known for high fraud for a reason. See if she is using you to get to the US. Would you still be in the picture if you decided to move there? Let's see what she says...
Good luck! I hope it all works out!