Hi M S ;)
I have the same issue, my daughter is 16 months and no longer wants to be fed.
I can tell you I have heard of so many women who regreted not allowing their kids to try because they weren't getting enough food OR bc of the mess and later couldn't get the child to eat on their own or touch a fork.
My only suggestion - which is what I do after seeing the yogurt dripping off the wall :)
Offer him snacks every few hours, healthy, like fruit, that is finger food so if he tries with a fork he can also do it with their hand.
If you're giving snacks you know he'll get enough nutrition.
I give my daughter fruit strips, they are by gerber I think, come in different flavors, no additives, organic fruits and its 99% fruit because she eats it with her hands, no utelsils needed.
I also have sweet potato cooked all the time as a snack, string cheese, you can find some neat stuff at different stores. I'm not very creative so I always look for alternatives as snacks that aren't "junk" I refuse to give her anything that will trigger later in life, chips, sodas, candy, in fact, when I serve dinner, she goes for veggies and fruit first always, well, let me correct that, unless there's PASTA, she loves that just like M. hehehe ;)
Amy