Welcome to pistol-forum. I joined this site in 2014, basically knowing nothing about guns. I'm also pretty analytical by nature, but didn't know what I didn't know. I still don't know a lot.
I would suggest three things to think about, in terms of where to spend time as a new shooter. The first might surprise you, but it has to do with
Mindset. I read somewhere
Whenever you unholster a gun, you are making potentially life-altering decisions. It's true, if you think about it. So, I would familiarize myself with the laws of the state in which you reside, and do some reading on considerations for being armed. An excellent overview of that is in Andrew Branca's book,
The Law of Self Defense:
https://www.amazon.com/Law-Self-Defe.../dp/1943809143
Mr. Branca's book will go into the legal aspects of using lethal force in self-defence. The point here is to have thought about the aftermath of a self-defense shooting, before it happens. A second book I highly recommend is by Mr. Tom Givens, which will give you an even broader overview of being armed, including many specific suggestions:
https://www.amazon.com/Concealed-Car...s=books&sr=1-1
Next, I would focus on
Skillset. This would include a good, solid, introductory foundational pistol class with a regional instructor. There are many here who can suggest one in your area, if you post your zip code. You can also look up classes available, here, using this handy web search tool:
http://www.firearmstraininghub.com/
Your local gun store likely also has class options. Your Glock 34 will be fine in such a class. The instructor can advise what additional equipment (holster, belt, ammunition, etc.) you can expect to need for the class. Then (or while waiting for the class), I would focus on
Toolset
Safety is number one, of course. Your Glock is a very reliable, accurate, easy to shoot pistol. It's also fairly large, relatively speaking. It would be a good idea to get a solidly constructed Kydex holster designed specifically for it. Several site sponsors make good holsters, among them Dark Star Gear (
www.darkstargear.com) and JM Custom Kydex (
www.jmcustomkydex.com).
As far as using your Glock at the range, absent specific instruction, an initial metric I would suggest for a first time shooter would be to consistently hit inside an 8" circle at 7 yards. If you can meet that standard, you'll be better than 80% of the shooters I typically see at my public shooting range of a weekend. If that seems easy, there are many other standards that you can strive to meet. If this is difficult, it would be best to get some in person instruction, as diagnosing shooting issues over the internet is pretty hard. So for your case, what you can currently achieve now, kind of drives where you can go and what you need to work on.
Hope this helps. This is a great forum; I'm looking forward to reading the responses you get from the more experienced folks (which is most of them!) here.
Rich