Congrats and nice shotgun. I noticed on the other thread that you were talking about hitting the second dove opener? May I suggest you start with the quail season first for several reasons. First being the dove are already smarter and much less abundant (bad combo) than the first season. The second one being that it is far easier for newer shotgunners to hit quail which take time to flush up before they get going, and also almost always fly straight away from you, much like clays that we all practice, rather than sideways by you already up to freeway speeds. Having taught many new shotgunners (including two kids in the last two years) I can tell you without a doubt it is much easier and fun for them when learning to hunt quail rather than dove. Once you get it down well, then go for dove and have a blast. Just a thought.
And you absolutely do not need a dog to hunt! No way, no how! It may make it easier to find birds some times, but not easier in general. Especially when you factor in all the cost, care, training, and inconvenience at times. But if you do hunt without one, I highly, highly suggest #6's and a modified choke minimum. Full is even better if you can learn to hit with it. I know many bitch and complain about losing say even 1/3 of the breast some of the closest birds with tighter chokes, but it sure beats losing 3/3 of it when it flies off crippled or runs away crippled and hides. And the 6's will usually drop birds instead of just many times knocking them down or slowly killing them with 7-1/2's, and having to play a lot of hide and seek. No fun, trust me. Plus, there are many times chukar where there is quail, and you already have the shot for them in there so you do not miss that rare golden opportunity that you will kick yourself for later. And you can always wait to take a further shot with a full choke, but you can never make them turn back round to you when they are too far for your modified or improved choke. And being newer to birds, it will take a bit of time to get used to birds flushing, then picking one out as you shoulder it, and finally shooting. Very rarely will they be too close for that full choke, even for us that have been doing it for years

. But again, these are just suggestions from what we have picked up over the years, good luck which ever way you go.
When you guys talk about hunting with a full choke, does this still apply if you're using steel loads? I thought I read somewhere to use a choke one level lower if you're using steel.
Yes and no. Yes, you can use full choke on steel, but no, not with all choke tubes. Only certain manufacturers say that you can. Carlson chokes will tell you that you can use all the way up to full with steel right on their website.