I would suggest If it helps you and I'm not an expert by any means at all, far from it in fact; but because you are good at reading, try reading out loud what you have written, and you will hear where you need to pause, bung a "," in there. At the end of each statement or thought, whack in "." If you changing topics or making a big leap in what you are saying put in a paragraph.
If your still not sure what to do there is always the punctuate or die test: That is if you run out of breath while reading out loud, you need some punctuation, to give you a chance to pause for a split second and breathe in again to continue living.
I hope you take this as intended, to be helpful not picking on you.