What is the best way to request a cuddle session on this site? Any dos or donts?
Best results are obtained by searching on the Cuddlers page and contacting individual members. Worst results are obtained by posting on the Cuddle Requests forum. Before contacting individual cuddlers, read the articles on how best to craft your message in order to increase your chances of getting a response, especially this one: How to Approach a Woman as a Potential Cuddle Buddy.
But understand that no matter how well your craft your messages, sometimes you'll get crickets. Just ask @quietman775. He writes great messages, has a well written profile, has fair amount of people on his Friends list and has seven really good reviews. Yet despite all his skills and references, he still gets a fair amount of no replies when he messages someone new.
One of the biggest complaints women on this site have is guys who have little to nothing on their profile. Like yours. It is incumbent on the man as a total stranger to make a woman feel that he is safe to cuddle with. I have to say that on the basis of your profile alone, you have not done that. Based on a few friendly private messages we've exchanged, I don't have any misgivings about you. You seem like a nice guy. But your profile right now is not helping you. There just isn't enough on it. Most of the women on this site get plenty of messages in their inboxes. If you force her to try and do the extra work of trying to get to know you because you have very little on your profile, most of the time, she will pass.
I suggest you look through the sticky post on the general forum titled Cuddling Discussions and Resources, particularly the section called Contacting Other Cuddlers. Lots of good tips there. Good luck!!