Awesome work man! You've obviously put in a great deal of effort in the gym and the kitchen. It has really paid off for you.
Your question as to how you could place at a show is impossible to answer, but I believe you're at a level where you can be competitive in a local show. The variables include things like who shows up to compete, what kind of conditioning you show up with, what the judges are looking for on that particular night (It can vary a bit in physique), what level show you are talking about, etc. I think I can confidently say that you have the sort of physique that I've seen in shows, so I would give it a shot if it's something you want to pursue. I think you've built up enough size overall to start competing. Your delts and arms seem to be very strong points for you. Chest looks pretty good, although maybe lagging a bit behind your arms. You don't have a good back picture to assess, so I can't give any feedback on that. The one picture looks ok, but that's a weird pose.
If you want to get a better idea of how you might place in a show, I would look up past winners of the particular show you want to compete in, and see how you stack up against the competition.